Some good kernel 2.6 info for people interested in trying out the 2.5.* series in anticipation of the soon-to-be-here 2.6 series. Information on some common gotchas (blank screen after decompressing kernel for instance), how to patch, things that are new, things that are gone, things that have changed.
I've personally played around with the 2.5.7[1-4] kernels a bit in trying to get my new motherboard to work (the nforce2 based A7N8X). I didn't notice a huge performance difference, even with the new schedular, but I was running a 2.4 kernel that had all the new 0(1) schedular stuff in it already. There are a few things in GNOME that need to be adapted for the new kernel still, but that'll happen when things get closer I'm sure.