Actually, no trying to be nosey, but is there a reason you're trying to pick up more AP's? You mention that you can detect 20 or so. I think the important thing is not how many you can detect, but how stable is your connection to 1? Are you connecting to a municipal network, a WISP, or another private AP? What is the throughput like? What sort of bandwidth do you require? Those are the things that are probably more important to most users than how many AP's they can detect.