My 2.2 update notice showed up on my phone this afternoon in the middle of a raging thunder/lightning storm. Erring on the side of caution, I decided to wait for the storm to pass before starting the download. TORTURE. Waiting while that update button called to me.
Storm passed, download happened, and all is well. Even apps that some said wouldn't work with the update (Missed Call, for example) all seem to work.
So far - I'm a happy camper.