I was looking today and i noticed im surprised that Ups does not have a app in the app store, I know fedex does but one would think they would have one to, has any one heard of a UPS app for the iPhone i think it would be really nice to have.
I use the TrackMyShipments (lite) to monitor all my incoming and outgoing deliveries, and so far it works pretty awesome since the first day they launched it. It's easy to use, you just forward the email containing the tracking number to their own email address and it will show up on your account. Don't be fooled by limited to 1 tracking, you can do more on the lite version