The Game Boy Micro - updated

I'm not interested in their new Revolution console as Microsoft and Sony have the home console market sewn up, but Nintendo are still the kings of the handhelds - and the Game Boy Micro proves it! Look how small it is! The screen is just 2 inches diagonal. To gauge the size from the picture above, look at the width of the GBA cartridge at the bottom. It's the first Game Boy to have an adjustable backlight. Like the SP, it is powered by a built-in rechargable li-ion battery (they've not released battery life specs yet).
The Game Boy Micro is definitely a no-brainer upgrade for all Game Boy, Game Boy Color and Game Boy Advance owners (i.e. anyone who's Game Boy doesn't have a backlight). But for Advance SP owners, it's a tougher decision.