I am in the market for a smartphone for work and the most important feature I am looking for is Google Calendar function. I need to be able to see many calendars as well as edit/add/delete events. Also, I don't want to have to sync with a computer. I've heard iphones aren't terrific with Google calendar. Our company mobile plan is with AT&T so ideally it would be compatible with that but if something else is the best (G1 for example) I could open a new account.