Quote Originally Posted by Gamespot
Nintendo also revealed a new edition of its Game Boy Advance handheld. The Game Boy Micro shrinks the already diminutive GBA down further and still retains the functions of the GBA SP. The unit is slightly larger than an iPod mini at 4 inches wide, 2 inches tall, and .7 inches deep, and it can fit easily into a gamer's back pocket--"even tight jeans," as Fils-Aime put it. "It's a hip new way to show off your portable passion."
Article, plus pictures: http://gameboy.ign.com/articles/615/615202p1.html

I'll post what I already posted in another forum:
I really don't know why we need another GBA incarnation, especially with the DS. But whatever, it's not like this little thing really matters.