iPhone client app to send SMS

Application that will communicate with our server trough http. In brief after installation the user will be able to chose a password and buy credit (trough the os 3.0 inapp appstore purchase). Once the credit is loaded the application will allow the user to select the receiver of the sms from the contact book, write the body and send all the details (sender number, password, receiver number, body of the message) to our server trough http. Out server will take care of sending the sms trough the gateway. Client iphone application will keep an archive of sent sms (grouped by receiver like standard iphone sms chat with ability to remove entries from the archive. Note: Only iphone client app to be developed. We develop the server side. Important: Bidders must show proof of developed applications present in appstore and bid will include also submission to appstore and eventual corrections till publish date.