The oprofile 2.5 patch is settling down now. The code is mostly written; I'm waiting on graydon's cpu model patch so I can steal it, and then after some tidies I'll probably post a patch to linux-kernel, to the deafening scream of millions, no doubt.
I do not know what I would have done without serial console and the NMI oopser. It's a godsend.
Btw, please certify the other oprofile lead developer phe, who's just joined.