Apologies if this has already been posted, but I'm surprised at how good Google Sync is. I no longer have to worry about third-party things like OggSync for Google Calendar integration - now it just works, and it's pushed to the phone in about 5 seconds. My only question is why didn't they add support for push email? I still need ImapPusherService for that. Other than that, it's excellent, check it out at
http://www.google.com/mobile/winmo/sync.html .