I haven't seen someone play a GBA for a year or so. Pretty much everyone at school has taken the upgrade.
I'm pretty sure that the GBA is just about dead now. If you look on www.play-asia.com, there are only two GBA games slated for release.
Well on other retail sites theres quite a bit more plus more games have been announced Enchanted and the next Spyro game. THQ and EA have a few movie based titles each to come too. Nothing special really but I guess GBA games are still shifting enough for new games to be announced, its a shame that original titles are basically dead.
GBA died once we realized that we were getting collectively short-dicked by the Mother 3 translation teams who posted 90+% progress and now it's "Oh, no sorry guys, we not really that close and we're like, teaming up and stuff".