Lantus: You're alive!
Bear: You're vanilla now!
Anyhow, WTF?!?! I take it you are either joking, or he really is developing a Gamecube emu for the XBOX just a proof of concept, as in:
yes the xbox can emulate the cube, and no it can't play squat, nor at near full speed, etc.
What I would FULLY suggest is buying a used Cube for $60.00. You then can either buy a chip and a new cover so you can use full sized DVD's or you can save your cash and just buy the games used, as most titles are available now for $10.00 anyhow.
I'd also HIGHLY suggest the GBA adaptor, as it will allow you to play your GBA titles on your TV FULL speed, which is not the case at times on the XBOX.
Also there are MANY flash carts available for the GBA, making that well worth the purchase as well.
... I hope your not encouraging piracy there.