I saw it in action in our office here in LoDo - very impressive.

I only have a couple of apps installed (Twitter, Grocery IQ) and have just been using the built-in apps for just about everything else. Of course, T-Mobile coverage is only edge at my house - I think that's supposed to be better for battery, but I wonder if the phone is constantly looking for a 3G signal.

Regardless, no noticeable difference in battery from 2.1 to 2.2, and phone usage pattern is the same. I was disappointed.

I've upgraded my borrowed NexusOne to Android 2.2 and I'm afraid I haven't noticed an improvement in the battery life...

Interesting that the iPhone version is free while they charge for all the other mobile versions:

http://www.weather.com/mobile/pda.html

Great work everyone!