I asked this guy if his driver will work with the SR71, but he didn't really give a sufficient answer.
(sorry, i can't post links just yet. so here it is unlinked.)
Give it a whirl and let us know if it works, yeah? I'm very interested in buying this card, but I want to make sure it will work flawlessly with Backtrack before I get it. I may wind up just getting that 500mW Alfa that everyone's always talking about if I can't get a definite answer on the SR71.