I have been having trouble with overnight battery drain as well. I have attached Battery Graph plot. Note that the CPU usage is VERY low. I also put the phone into airplane mode to attempt to prevent the battery from draining but it still managed to kill the battery overnight. Note that I am running the ULV kernel overclocked to 700 mhz, so nothing too aggressive.

Any thoughts on what is using all this standby power when CPU load is low?

(Note, the large block of CPU usage at 9am is a Battery Graph bug. When I look at it on the phone, that becomes a single spike when I scroll left or right)