Well there we go - any takers? Sounds like a job for a windows genius/guru experienced in Atheros drivers.
I just checked, the same AR5213 card that MT sells is also available as PCMCIA (CB9), so drivers should be same/similar, and it's an a/b/g card, with turbo mode support.
Then all we need is a VOIP handset supporting Nstreme as well, high-speed roaming support, and we'll have the best WISP system ever ....
CableFree - Wireless Excellence - Microwave, E-band Radios, Free Space Optics, High performance Radios & Routers