A couple of Rockbox devs now work on getting a port up and running on the Olympus m:robe 500 player.
This beast has 640×480 resolution, touch screen and a camera! It is powered by the dreaded TI DM320 chipset, has 64 MB ram, 8MB flash and 20GB hard drive.
Anyway, the first code snippets have been committed to SVN so if you own one of these toys, now is the time to join in and make things happen!
Gathered hardware info, Cowon A2 and Neuros OSD both run Linux on basically the same main microcontroller.