Yes, no joke - a GameBoy Advance emulator has been announced by CrimsonFire called Firestorm gbaZ! Coming March 12th to a Zodiac near you:
This emulator will also play Gameboy and Gameboy Color games, so it will be quite a value for the money. Speaking of money, the price will be $19.99 or $15.96if you pre-order.
It will be interesting (to say the least) to see how this turns out! Also, keep in mind that Kyle Poole is NOT one of the programmers for this emulator, so he's not neglecting his game projects.
Feel free to post about this upcoming emulator in this forum thread (thanks OrR).