Flandry

Regularly checking Conky (if that's reliable enough ?) showed no rogue processes running.

No placebo either - I was surprised (given how happy many people have been with power kernel) but both Battery Eye and the DCEW showing output of lshal pointed to my battery dropping off a cliff on Ideal. No reboots though.

And my battery life on day 2 of QCPUFreq alone is noticeably, actually measurably better ( 68% now after 12 hours use, as opposed to 40 odd percent on stock and 30 odd percent on ideal ) .

I can't explain it, but there.

Overall my little N900 has been exceptionally well-behaved on both software and hardware fronts. I'm quite content to sit back and enjoy my newfound lease on battery life for now