You will be surprised to see how little time it will take you to prefer it to a mouse.
I just went out purchased today a Logitech Wireless Mouse M305 from Office Max (on sale for like $15). Though I think it’s better to use the trackpad on the Air, the mouse is going to be more useful when I‘m doing extended work on the Air, especially when I‘m working between two or more applications. I seem to grab and move stuff faster with a mouse than I do with the trackpad. But again, like I said, the trackpad works great for the hand gestures—e.g. enlarging web pages and pulling up the the context menu on selected items.
Lol, damn, I just realized that this M305 Mouse doesn’t come with a 4th and 5th buttons. I was so taken with the price that I completely overlooked that. That means this mouse won’t be as useful with SteerMouse as my desktop 8-button Logitech mouse. Dang, I might have to take this one back.