Since the BGE is getting more interesting developments I have been thinking of fun projects to do with it.
Sago and Chris Plush are both keen on making games for handhelds, and I like the sound of it too. But the big names (Nintendo DS and PSP’s etc) are entangled in the usual SDK non-disclosure crap.
I was thinking it would be cool to port the BGE to a Linux HandHeld.
Such as http://www.gp2x.com or http://openpandora.org, Also see http://www.gbax.com and http://www.tehskeen.com/forums/showthread.php?t=5554
Supporting spesific hardware is risky and Im sure a lot of people would be interested in this but never buy a handheld to play the BGE, (remember blender on the IPAQ?) still cool stuff, and if the handheld is 600mhz, running linux with OpenGL accel, it might not be so hard.
Id also want to support more then 1 device if possible so as not to be too limiting on the userbase, 2 or more linux/ARM based systems.
This could be a smaller goal for a future open-game project.