OK, since APBSs use a standard WaveLAN card, what about replacing it with a G card for (up-to) G bandwidth? I reckon it wouldn't work right out of the box, appropriate firmware would need to be installed. And that means someone'd have to write that firmware . . .
'Course I haven't a APBS so can't even try it meself, but I figgered it'd be worth tossing the idea out here anyhow.