Re: Beagle Wifi Adapter
Make sure you unplug the Ethernet cable from the bone when resetting; it won't run both wifi and wired ethernet at the same time.
As others have stated, also make sure you're booting from the latest image (from May '12). I have rev A3 but put the latest image onto a 8G micro SD (4G is required). After that, then do 'opkg update' and 'opkg upgrade'. IIRC, 'ifconfig' froze for me before the update and upgrade, but not after.
Finally, proceed with the steps in the tutorial, unplug the Ethernet cable and reset the bone with the wifi adapter plugged in.
I used CoolTerm over the USB connection until these steps were done. (I did connect wired Ethernet once to check it was working, but then went back to serial over USB)