It took some research, but I now have the instructions nessecary for changing the MAC on the wireless side to whatever you want! Coupled with a matching SSID you now have your own embedded 'Evil Twin' (hate that term), spoofed AP for doing whatever the hell it is you want to do. No more HostAP mode and laptops, just a small blue box, easily hidden inside a teddy bear

Personally, I see potential of extending this research further and ending up with my own embedded airsnarf box, but my scripting skills suck

For now, have fun with what I have posted at http://www.renderlab.net/projects/wrt54g/wrt54g-spoof.html
As usual, questions, comments and improvements are welcome.
Mod: Sticky again?