Tech Tonic will soon be selling the HDDivX hard drive based DivX player. The player is compatible with MPEG4 (DivX), and MPEG (DVD) files, amongst others. DivX files can be loaded on the 20GB internal hard disk drive via USB 2.0 and the player will connect to either a TV or PC monitor for playback.
The hard drive has a maximum capacity of 80GB if you fancy upgrading it, and it can naturally be used as a standard HDD if you so desire. Pricing is still to be confirmed.