I've done something different and have noticed a huge difference in battery life.
THIS APP helps a lot.
#1, turn off the data syn, I can manually check email if needed.
#2, turn the Facebook updates to 2 hours.
#3, and most painful, but leave the wifi off. And honestly, with 3G, it is not that big of a difference. Even Pandora.
#4, leave screen on 50% brightness.
I've had normal use of my X today, off charger at 6 am and it's 4:00 and I've got 50% battery left.
Normally, it would have ran down by now. But I had left all that stuff on defaults and wifi on all the time.
I use my X a lot, I can't believe some people listen to music, call, text, Pandora, calculator, surf, read news/weather and get 26 hours out of a battery.
I'm hoping, if this whole thing about Android "learning your memory useage" is real, the battery life will get better as I do it this new way.
At any rate, it is better now some.