XFree on OS X
I just finished installing Xfree86 on my new iBook. The installation was pretty straightforward, and after digging up some precompiled library packages, it actually works. I've since installed enlightenment and the GIMP. Screw Photoshop. Now if only there were an open source DV editor that would replace Final Cut or Avid Express...
Performance wise, the draws on X are a bit slow when using the default manager, but after installing enlightenment, things are much more usable, though still slower than it would be on a fresh install of BSD.
Things are looking good so far.