BreakmanX.com

A new device has been developed by Taiwanese manufacterers that lets you play Famicom/NES games on your Gameboy Advance SP. It is not yet known if this device will be able to work with the original GBA. I think the whole idea is very interesting and I'd be willing to get one if they worked really well.

http://www.lik-sang.com/news.php?artc=3161