Again, you would need another computer to make this work. I am beginning to think that the Air is not meant to be an only computer -- it needs another computer to function well.
There are some USB connections, and I can't remember which ones now, that don't like working from a hub. They want to be connected directly. This computer is seeming like more and more work... unless it is a second computer and you use it just for traveling around. Which is probably what it is designed for.