I've been using CyanogenMod 6.2 for a while now, and finally decided to try out the latest BB.
I installed BB 0.6.2.1 from RomManager, which only wipes cache/data once (something I don't normally do).
When it loaded up into BB a bunch of stuff was screwed up, BUT the power control widget in the notification window was there and it was working.
Unfortunately it wasn't to last, I opened clockwork mod and wiped data/cache/boot/system 3x before reflashing BB.
Would be great if BB could also incorporate this feature though!