Wow... I just looked up the Gameboy Micro on wikipedia... I'm not impressed, sure it is smaller than the palm of your hand, but c'mon, who'd want to play something on the screen about the size of about 2 fingers?
Personally, I'd never get one, but if it suits your needs, more power to ya!
BTW, DS Lite RULES! :P That's the one with the touch screen, and if you get a chip, you can listen to music, watch videos, surf the net, and do some things we're not allowed to talk about here...