Portable Sound Laboratories has released the iMainGo 2 (http://www.imaingo.com), an US$39.95 protective case, that turns your iPhone, iPod touch or MP3 device into a portable speaker.
It custom fits and protects all iPods, iPod nanos, iPhones, iPod touch®es and most MP3 devices. The iMainGo 2 doubles as an external stereo speaker system for any device with a 3.5 mm connection. You can control and view your device without opening the case.
With the iMain Go 2, you can wake up to music with built-in alarm feature (on alarm-equipped iPods only). It comes with four AAA Energizer batteries and a removable carry strap and measures 5.7 x 3.8 x 2.4 inches.