Thinking about what's missing in our library coverage

[Isaac Dupree]

>>    * Data.Map String Int
>>    * Data.Map ByteString Int
>>    * bytestring-trie

What about a Unicode/text aware version of ByteString?  I mean, I 
suspect people will want to use this map for strings of characters, and 
I want to make sure we don't hardcode a type that will cause us trouble 
in the future (and I have this idea in my head that ByteString is 
supposed to represent byte-sequences and not character-sequences).

Just checking

-Isaac