Hey, sorry if this has been posted before (i didn't search because i don't really care too much about arm stuff)
anywhooo I came across this site whist searching for casemod stuff and its only 150bucks. and it has opengl, may be cool for what you guys are talking about.
http://beagleboard.org/hardwareits called the beagleboard and it has some pretty cool specs (maybe i will get interested in arm)
actually here is the main site they have one available for 125. oh and this thing runs linux.
http://beagleboard.org/