Gentoo with Linux 2.6.10. Been working on installing & configuring the past few days. I've got a decent number of progs installed and I'm finding it a joy to use.
What you see:
- KDE 3.4 in all of its beauty
- JuK playing a bunch of mp3s I just ripped
- Inkscape getting ready for some serious vector graphics work (it's so much more fun in Linux)
- a nice wallpaper from dA