Must have Apple Iphone 3G applications - Ebay Mobile

Its actually not an application its an Ebay Webpage specialy designed for iphone look like an application interface its easy to browse your bids or products

Ebay Mobile

MobilePet myPhone

One of the first game launched for the iPhone is Cellufun's MobilePet myPhone that is a virtual pet game, only that the pet is actually an iPhone. And like any pet it has needs, you have to feed him, but what does a petphone eats, you ask? Tunes and videos, of course!
The mini iPhone also plays by browsing the web and using mobile games, but sometimes it get's sick and needs to visit the virtual computer store to get well.

MobilePet myPhone is available online from your iPhone and also from other 566 handheld devices.
The game has a scoring system, that gives you points when you take good care of your pet and also when your friends visit your pet's page on Cellufun's site, and at the end of the month, the player with the highest score wins a real IPhone!