Very cool. I hope to see nifty stuff like this for the Maemo device too. We'll have a GPS, too, so the possibility of full human-scale games becomes possible... Won't we all look like nerds, walking down the street, holding up our devices to look for enemy players (although they'll be pretty obvious; they'll be holding up their devices too...)

How about a vibra-alert that lets us know we're near another player... Both players have to draw their devices, locate the enemy via augmented reality (which will also show you what team, class, kind of armour and weapons they have,etc), then you have to attack... The coolest battles will be the 'swordfights', where the game links the players via bluetooth and uses the accelrometer, GPS, camera, etc to locate the players' weapons. You wave your devices around and they make light-saber sounds, sizzling and buzzing the vibrator when they strike, and the devices announce hits and damage...

yeah. cooler than skittle-bombs.