gentoo-sources-2.6.23 feature changes
In addition to all the upstream changes, gentoo-sources-2.6.23 (which will be in portage very soon) has some Gentoo-specific feature changes worth noting:
vesafb-tng replaced with uvesafb
Michal is the author of vesafb-tng, which is popular as it allows you to use higher frequency refresh rates on the VESA framebuffer to stop you getting headaches on CRT monitors. uvesafb is the replacement.
fbsplash replaced by fbcondecor