I just bought a $15 Logitech optical mouse from down the street (some little hole-in-the-wall computer store) for use with my iBook and it wont work. Before I attempt to get the store to take it back (no doubt they'll give me some trouble) I just wanted to check with you guys if I need to enable it or something? Is there some option I need to check? Being USB I thought it would just work, like everything else in my experience. Much thanks.