iPhone and iPod touch are not the most convenient devices for long sessions with your favorite games. If you are keen, however, and still looking for a convenient solution, you can try with accessories iHandstick. It has the shape of the Playstation controller and promises to make long gaming sessions more comfortable. Price is $ 16.99.
http://www.usbfever.com/index_eproduct_view.php?products_id=1625
