@hppacito:
In the A500 case, you could always go for an internal connector on the accelerator for one of those CF or PCMCIA wireless 802.11b nics. That way you wouldnt have to drill or cut in the case to get connectivity.
I bet the already existing orinoco/prism2 chipset
driver for the A600/A1200 PCMCIA port wouldnt need much modification to function with a orinoco/prism2 based card in a socket on your accelerator. That would also save you the work of writing a completely new driver for the ethernet chip.
/Patrik