Anti-Trend
Nonconformist Geek
You might want to try 2.6.29.5, especially if you have ATI graphics. 2.6.30 has some issues, and ATI is apparently too far behind in the development game; their drivers won't build against '30 yet.... TBH i'm on default kernel, i've got 3D (1280x1024) got kernel you rolled installed but it won't boot, just freezes at "bootin the kernel"
BTW: non booting kernel is: 2.6.30 P4
Also, what CPU do you have? If it's a later p4 like a Prescott or Pentium-D, you can use the prescott build for better performance.
http://kernel.hardwareforums.com/about