Over at http://dreamcast.dcemu.co.uk/ it look like the author of the 3DO emulator just released a Dreamcast version and is now working on a GP2X port.  I'm not sure how well the emu will run on the GP2X, but the fact that it's being ported is quite nice.  I wish the author and others helping with this port the best of luck.
				
			 
	
 
 
		 
 
		 
 
		 
 
		 
 
		