A new release of X11, ready for ghc 6.8, (and the upcoming xmonad
release), is on hackage, and tagged in darcs:
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/X11-1.2.3
Main change is Ross fixed the Setup.hs file to not use wacky hooks.
Future plans are to merge the X11-extras (aka Xinerama bindings) into
X11, for the next release.
-- Don