Read about it here:
I followed the directions on the gentoo forums, using debian 3.1, and a 2.6.15-rc6 vanilla kernel (running on a G4 ibook), and everything seems to be working so far. The only problem I had was that insmod didn’t work for softmac or bcm43xx, so I did a make, make install, and modprobe (instead of make and insmod).
I can detect a wireless router near where I am staying for the week, but I’ll have to wait until I head back to my apartment to see if I can actually access the net.
Feel free to post questions/thoughts/experiences here.