iphone Camera App - Simple Water Mark

Hi, I want to develop a iphone App that: * Will take a picture using the Iphone Camera * Place a water mark on the photo * Show the operator the water marked photo * Prompt the operator for mobile number (not a contact) and a email address * The iphone will email and MMS the picture if they have filled out mobile/MMS options Thats it !! What the idea is a person takes a picture of one of our items in the shop and it will have our shops logo and phone number over the photo, say in the bottom left hand side. Then the photo with the logo on it is emailed / MMS'd to the customer. Thanks James