The PRIZMer is a small casing for a 2.5″ HDD and you can fit a 40/60/80 GByte harddrives in there. It’s MP3, WMA and OGG compatible, and when it comes to video support, it accepts HD 480p, 720p, 1080i and supports DTS, AC3, 2.1 and 5.1. There is no mention, however, which video type it supports.
It’s even possible to mount this disc in your car. An article on Technoa Korea refers to it as a “DIY Car PC”. The cool USB2 case weighs 115 grams and measures 113x80x23 mm. Expect a price between $200 and $250.