The DocBook Project is the SourceForge project where the DocBookStylesheets (and a bunch of other things) are maintained.
Members of the DocBook Project include: NormanWalsh, AdamDiCarlo, BobStayton, DavidCramer, DavePawson, JeffBeal, JensEmmerich, JirkaKosek, JorgeGodoy, LeonardMuellner, MartijnVanBeers, MarkJohnson, and MichaelSmith.