Has anybody played with one of these things yet?
Hugo's got the similar-sounding Kiss DP-500, which he seems quite pleased with. The navigation of MP3 and JPEG content is a bit basic, but usable. The included server software is Windows-only, but apparently there's some Java stuff on Sourceforge that can be made to work on Linux.

Mind you, the only Right Way to make this kind of product (or, in this day and age, Rio Receiver-type or Central-type products) is to use the UPnP MediaServer specifications, which AFAICT none of these three does.

Note that (apparently) the GoVideo doesn't do MPEG4 or Divx, and the Kiss doesn't (apparently) do MPEG2 from a network source. It looks like the Oritron is the only one with all bases covered...

Peter