I would not be surprised if all those wireless bridges you mention work for one computer at a time. On the other hand, yes, what you're looking for is called a wireless bridge and I did this exact thing years ago just before the 802.11b thing hit. We used a product put out by Aironet (before Cisco bought them, I think). They call what you want a (wireless) workgroup bridge, and others seem to have taken to that terminology, too.