Here's what I am seeing...
"standby" drain with as many power tweaks as you can find is actually in the ballpark of the mogul. Yesterday I didn't use the thing much in the afternoon/evening, and even with a couple of bluetooth on sessions and the usual hourly IMAP email checks on 2 accounts, but almost nothing else, it used about 30% of the battery in 7 hours.
"in use" drain seems much worse then the mogul. That big beautiful screen seems to be the major issue (radio drains are more or less the same) so if you spend a fair amount of time with your screen on (surfing, txting, looking at the weather animations
) your battery will be dipping faster then it would on previous QVGA devices.