I updated to 2.2 yesterday morning and everything seemed fine including battery life. Late afternoon I put it on the charger and took it off at 18:00 as usual which normal gets me through to the next afternoon charge cycle. Last night I got the alert around 00:00 that the battery was dead/put it on the charger message (was up working). Thought that was strange but plugged it in. Took it off the charger this morning at 8:15ish and headed into work. At 12:00 it was almost dead again. Has the 'refresh circle icon' flashing in the notification bar. Digging around in the various sync areas it appears it's hanging in the Exchange calendar sync. Mail/contacts sync fine but it just keeps syncing on calendar (settings->accounts & sync->Exchange Activesync->sync calendar). Turning off the calendar sync and no more notification bar refresh icon. Unfortunately I can't confirm yet that this fixed it since it's on the charger from being almost dead. Any one else noticing this?