I'm not sure where it is, but I'm really not sure why this Micro version is even coming out. The GBA: SP is the perfect size for your pocket. It feels perfect in your hand. The buttons are easy to get to. You can play for hours upon hours with no hand aches. The battery life is absolutely massive (10-15 hours with the backlight) and the LED hasn't went out on mine since I bought it. Plus, you can't scratch the screen with it folded up, and the screen be be tilted to the way you want it for different heights. It plays GB, GB Color, and GB Advance games. Why in the HELL would you want to make something even smaller that gives up some of these conveniences? The only plus the Micro has is a direct headphone jack. I think the Micro was developed because of the iPod Nano.
SMALLER IS BETTER!! HURRAY!!!
-Lasereth