I am using a USB wifi adapter on my Lion imac. I am trying to use that connection to create a working wifi hot spot with the imac's internal airport.
I tried following these instructions: http://maketecheasier.com/create-wifi-hotspot-using-mac-os-x/2009/10/20
It didn't work, though. It feels like i need to do one more step to get the connection bridged between the usb adapter and the airport.