424722 iPhone App wanted

This project is for an iPhone app. The app must work on iPhone, iPad and iPod Touch. The app is to let users to send cards to friends. User can send a card to more than one friend at a time. These cards are static and DO NOT have no animation or flash. Please suggest: 1. Card format (jpeg, png, or...?) 2. Card size 3. Card resolution/ pixels 4. Any other information I should know about the cards for this app. Let me know your experience inn iPhone app and how much time you needed. For serious programmers only. Long-term partnership needed. Winner will have the best chance to win my future projects. Thanks.