Straight from ALA WAC, there is a 44 page draft style guide (doc or pdf)for the ALA website making the rounds.

If you’re Section 508 compliance-proficient or if you’d like to lend your eyes for a readthrough and comment upon, please feel free.  Comments here or over on WAC Chair, Michael Stephens’ Tame the Web post or via email to the Web Editorial Board would be much appreciated.  [add:]Please feel free to use the ALA ITTS WebPlanning Wiki as a more central commenting board. (You’ll need to register to comment on this wiki, tho)[end add]

I, Michael, and the WAC (along with all the ALA webcontent volunteers) thank you for your effort.