Quoting Spencer Janssen
(1) Full screen windows (2) ICCCM focus protocol/make Java work (3) Handling of a few window types: dock, desktop, etc. (4) Status bar without editing xmonad.hs (current plan is to do this via EWMH)
These are a good start. I assume (1) means (isFullscreen -> doFullFloat), and (3) means sticking avoidStruts/manageDocks in the core. To those, I would add smartBorders, modMask = mod4Mask, something to address http://www.reddit.com/r/xmonad/comments/aaexm/gnome_do_in_xmonad/c0glyav (not sure if there's even anything in contrib right now for this), and perhaps switching the default layouts to one of the hinted ones (can't count how many people complain about urxvt's, emacs' and vim's misbehavior in #xmonad). I think gwern's suggestion to have some kind of welcome-message for first-time users should also be considered part of the proposal. 2 cents, etc. etc. ~d