Starting this thread since the existing one is mysteriously marked solved, when it is a long way from being fixed. Battery life has been cut in half for almost everyone who ran the upgrade to Android 2.2. Verizon tech support has been useless on the issue, denying they have heard of it, and then trying to get you to turn off all the things that are the reasons we purchased these in the first place. They don't seem to understand they worked fine before the update, and they work like crap immediately after the update. Ergo, the update is causing a major issue.
It took months too long for the update to come out, when it did it was still bloated with Verizon crapware, and it essentially crippled the phones. It would be nice if someone from Verizon would post something (or better yet text all of us who have one of these phones) and tell us when we can expect this fixed.