So the 2.6.31 merge window has slammed shut, 2.6.31-rc1 has been tagged and released, and now the fun begins. I have just finished the job of rolling the Ubuntu kernel delta forward to the new kernel. So far my testing has been pretty positive for an -rc1 release:
$ cat /proc/version_signatureNow all I have to do is get the thing into the archive, expect this kernel shortly on a Karmic install near you. Be warned that KMS is enabled for both Intel and ATI radeon so if you have issues with X you might want to turn it off with i195.modeset=0 or radeon.modeset=0 as appropriate.