diff --git a/lib/gollum/blob_entry.rb b/lib/gollum/blob_entry.rb
index 1c3f8f2e..cbadc01c 100644
--- a/lib/gollum/blob_entry.rb
+++ b/lib/gollum/blob_entry.rb
@@ -3,9 +3,10 @@ module Gollum
     # Gets the String SHA for this blob.
     attr_reader :sha
 
-    # Gets the String full path for this blob.
+    # Gets the full path String for this blob.
     attr_reader :path
 
+    # Gets the Fixnum size of this blob.
     attr_reader :size
 
     def initialize(sha, path, size = nil)
@@ -15,12 +16,12 @@ module Gollum
       @dir  = @name = @blob = nil
     end
 
-    # Gets the normalized directory path for this blob.
+    # Gets the normalized directory path String for this blob.
     def dir
       @dir ||= self.class.normalize_dir(::File.dirname(@path))
     end
 
-    # Gets the String file base name for this blob.
+    # Gets the file base name String for this blob.
     def name
       @name ||= ::File.basename(@path)
     end
diff --git a/lib/gollum/git_access.rb b/lib/gollum/git_access.rb
index 409a0197..76568f73 100644
--- a/lib/gollum/git_access.rb
+++ b/lib/gollum/git_access.rb
@@ -1,21 +1,29 @@
 module Gollum
+  # Controls all access to the Git objects from Gollum.  Extend this class to
+  # add custom caching for special cases.
   class GitAccess
+    # Gets the String path to the Git repository.
     attr_reader :path
+
+    # Gets the Grit::Repo instance for the Git repository.
     attr_reader :repo
 
     # Gets a Hash cache of refs to commit SHAs.
     #
     #   {"master" => "abc123", ...}
     #
-    # Returns the Hash cache.
     attr_reader :ref_map
 
     # Gets a Hash cache of commit SHAs to a recursive tree of blobs.
     #
-    #   {"abc123" => [["lib/foo.rb", "blob-sha"], [file, sha], ...], ...}
+    #   {"abc123" => [<BlobEntry>, <BlobEntry>]}
     #
-    # Returns the Hash cache.
     attr_reader :tree_map
+
+    # Gets a Hash cache of commit SHAs to the Grit::Commit instance.
+    #
+    #     {"abcd123" => <Grit::Commit>}
+    #
     attr_reader :commit_map
 
     def initialize(path)
@@ -24,20 +32,19 @@ module Gollum
       clear
     end
 
-    def clear
-      @ref_map    = {}
-      @tree_map   = {}
-      @commit_map = {}
-    end
-
-    def refresh
-      @ref_map.clear
-    end
-
+    # Public: Determines whether the Git repository exists on disk.
+    #
+    # Returns true if it exists, or false.
     def exist?
       @repo.git.exist?
     end
 
+    # Public: Converts a given Git reference to a SHA, using the cache if 
+    # available.
+    #
+    # ref - a String Git reference (ex: "master")
+    #
+    # Returns a String.
     def ref_to_sha(ref)
       if sha?(ref)
         ref
@@ -46,6 +53,12 @@ module Gollum
       end
     end
 
+    # Public: Gets a recursive list of Git blobs for the whole tree at the 
+    # given commit.
+    #
+    # ref - A String Git reference or Git SHA to a commit.
+    #
+    # Returns an Array of BlobEntry instances.
     def tree(ref)
       if sha = ref_to_sha(ref)
         get_cache(:tree, sha) { tree!(sha) }
@@ -54,10 +67,20 @@ module Gollum
       end
     end
 
+    # Public: Fetches the contents of the Git blob at the given SHA.
+    #
+    # sha - A String Git SHA.
+    #
+    # Returns the String content of the blob.
     def blob(sha)
       cat_file!(sha)
     end
 
+    # Public: Looks up the Git commit using the given Git SHA or ref.
+    #
+    # ref - A String Git SHA or ref.
+    #
+    # Returns a Grit::Commit.
     def commit(ref)
       if sha?(ref)
         get_cache(:commit, ref) { commit!(ref) }
@@ -73,6 +96,11 @@ module Gollum
       end
     end
 
+    # Public: Gets a list of Git commits.
+    #
+    # *shas - An Array of String SHAs.
+    #
+    # Returns an Array of Grit::Commit instances.
     def commits(*shas)
       shas.flatten!
       cached_commits = multi_get(:commit, shas)
@@ -85,23 +113,62 @@ module Gollum
       shas.map { |sha| cached_commits[sha] }
     end
 
-    def multi_commit!(shas, hash)
+    # Public: Clears all of the cached data that this GitAccess is tracking.
+    #
+    # Returns nothing.
+    def clear
+      @ref_map    = {}
+      @tree_map   = {}
+      @commit_map = {}
+    end
+
+    # Public: Refreshes just the cached Git reference data.  This should
+    # be called after every Gollum update.
+    #
+    # Returns nothing.
+    def refresh
+      @ref_map.clear
+    end
+
+    # Raw method for fetching a list of Git commits.
+    #
+    # shas - An Array of String SHAs.
+    # hash - Optional Hash to store the found commits, indexed by their SHA.
+    #
+    # Returns the same Hash instance.
+    def multi_commit!(shas, hash = {})
       shas.each_slice(500) do |slice|
         @repo.batch(slice).each do |commit|
           hash[commit.id] = commit
         end
       end
+      hash
     end
 
+    # Checks to see if the given String is a 40 character hex SHA.
+    #
+    # str - Possible String SHA.
+    #
+    # Returns true if the String is a SHA, or false.
     def sha?(str)
-      str =~ /^[0-9a-f]{40}$/
+      !!(str =~ /^[0-9a-f]{40}$/)
     end
 
+    # Looks up the Git SHA for the given Git ref.
+    #
+    # ref - String Git ref.
+    #
+    # Returns a String SHA.
     def ref_to_sha!(ref)
       @repo.git.rev_list({:max_count=>1}, ref)
     rescue Grit::GitRuby::Repository::NoSuchShaFound
     end
 
+    # Looks up the Git blobs for a given commit.
+    #
+    # sha - String commit SHA.
+    #
+    # Returns an Array of BlobEntry instances.
     def tree!(sha)
       tree  = @repo.git.native(:ls_tree, 
         {:r => true, :l => true, :z => true}, sha)
@@ -110,14 +177,32 @@ module Gollum
       end
     end
 
+    # Reads the content from the Git db at the given SHA.
+    #
+    # sha - The String SHA.
+    #
+    # Returns the String content of the Git object.
     def cat_file!(sha)
       @repo.git.cat_file({:p => true}, sha)
     end
 
+    # Reads a Git commit.
+    #
+    # sha - The string SHA of the Git commit.
+    #
+    # Returns a Grit::Commit.
     def commit!(sha)
       @repo.commit(sha)
     end
 
+    # Attempts to get the given data from a cache.  If it doesn't exist, it'll
+    # pass the results of the yielded block to the cache for future accesses.
+    #
+    # name - The cache prefix used in building the full cache key.
+    # key  - The unique cache key suffix, usually a String Git SHA.
+    #
+    # Yields a block to pass to the cache.
+    # Returns the cached result.
     def get_cache(name, key)
       cache = instance_variable_get("@#{name}_map")
       value = cache[key]
@@ -127,11 +212,25 @@ module Gollum
       value == :_nil ? nil : value
     end
 
+    # Writes some data to the internal cache.
+    #
+    # name  - The cache prefix used in building the full cache key.
+    # key   - The unique cache key suffix, usually a String Git SHA.
+    # value - The value to write to the cache.
+    #
+    # Returns nothing.
     def set_cache(name, key, value)
       cache      = instance_variable_get("@#{name}_map")
       cache[key] = value || :_nil
     end
 
+    # Gets multiple values from the cache in a single call.
+    #
+    # name - The cache prefix used in building the full cache key.
+    # keys - Array of cache key names to fetch.
+    #
+    # Returns a Hash of the objects that were found in the cache, indexed by
+    # the cache key.
     def multi_get(name, keys)
       value = instance_variable_get("@#{name}_map")
       keys.inject({}) do |memo, key|
diff --git a/lib/gollum/sanitization.rb b/lib/gollum/sanitization.rb
index 72ba2ec9..b9f76aac 100644
--- a/lib/gollum/sanitization.rb
+++ b/lib/gollum/sanitization.rb
@@ -1,5 +1,4 @@
 module Gollum
-
   # Encapsulate sanitization options.
   #
   # This class does not yet support all options of Sanitize library.