I don't recall this being covered before. I just randomly went onto the Gamepark website, (makers of the GP32), and it looks like they've got not one, but TWO more handhelds coming out, both of which appear to feature some sort of 3d acceleration, and both of which look pretty sexy, IMO. Check it out here:
http://gamepark.com/xgp.htm
http://gamepark.com/xgpmini.htm
http://gamepark.com/xgp.htm
http://gamepark.com/xgpmini.htm