Apple today announced a major software upgrade for the iPod touch, adding five more great mobile applications to the device — Mail, Maps, Stocks, Weather and Notes. The iPod touch software upgrade also includes new features such as Web Clips, a customizable home screen and beginning today, the ability to watch iTunes Movie Rentals. New iPod touch products shipping from the factory will include the software upgrade and existing iPod touch customers can get the software upgrade for US$19.99 by purchasing and downloading it from iTunes.