Finally got it and tried it (on my 2.8ghz 1.25gig ram, Geforce 6600 GT) and ...
Game seems VERY cool and fun!!
But the graphics aren't that great. Seems like an upgrade of the old Quake 3 engine, is it? Models are average and texture isn't detailed enough...
But this is certainly a game that I'd play, regardless of the graphics (which are still *nice*).
Interested to see the 360 version.