I didn't want to start a new thread, but I'm working on a similar task. I was using my pi to access my mkiv and i figured why not just do it from the pi. so I, like you, managed to get karma installed and running, but it doesnt appear to be running correctly. Care to share any updates on how you were able to "broadcast" collected SSIDs. I'd love to give your image a shot sometime, but I can't right now as I need debian to stay functional for other programs.