Augmented reality apps are becoming more and more popular. These are the sort of apps that let you aim your iPhone camera at a restaurant and get information about the business. They are cool, but very limited in how useful they are to many users.
Rapidito Games has announced that it has released a new augmented reality game for the iPhone 3GS called Dimension Invaders. The game lets you point your iPhone camera around the room or area you are actually in to aim a crosshair on the screen at blue blobs.