Experienced Mobile app Graphics Designer needed for iPhone App.

Need app graphics made for an iphone app. (quickly!) Someone who is very experienced in creating graphics for iphone mobile apps. to create a feature rich, nice looking, mobile app. and icons. This is a 13 screen twitter like app including signup, login, settings, my profile etc. We already made drafts for 10 of the screens on photoshop. These existing screens will have some additional features and components to be added. The colors and buttons (icons) will be retouched. The non-existing 3 screens will be designed according to the main theme. We have 2 more apps U/I to be designed after this project. Please make your best bid.