(Note: I'm using 3.4a, so please correct me if something on here is already done ;p)
First off, since it's clearly quite a gaming distro now, I think it would be great to get the pidgin xfire plugin on there by default. Many windows users willing to come to linux are staying back for xfire, as plenty still don't know there's a working plugin at all. Several users already here have issues installing it specifically because they use an old version instead of one from the snapshot page by mistake. Oops.
Secondly, also related to games, perhaps you could add the xlaunch http://forums.gentoo.org/viewtopic-t-483004.html
script, and make mention of it for the aid of ATI users who have trouble playing 3d games in particular, but also for the use of alt+tab functionality absent from many non-wine/cedega run games such as ut2004. It's still useful for nvidia users like myself.
Third, a personal request: pleaaaaaaaase fix the mouse side buttons for Intellimouse Explorer 3A by default. Out of 30 or so distros I've tried, including all of the top ones on distrowatch, PCLinuxOS is the -only- one who got it right without me messing with anything. It doesn't seem to have fixed it the way I did on Sabayon, but whatever works, right? If you would be kind enough to do this, I made a specific sabayon howto for myself with exactly what to put and where that does the trick that I could send/post, if it would help..
Many thanks for a wonderful distro.