This looks like a great little app! But to be even more useful it would be great if it could show this information for all available networks, not just the one you're connected to. I've just moved house to a really tricky location from a radio signal perspective (got a big hill just behind my house) and I find myself unable to get a signal with my current network provider. So I need to switch provider, and there are a few to choose from, but I need a way to tell which provider will give me the best signal. Does anyone know a way of measuring the signal strength from different providers?

Edit: even a simple command-line tool would do!