Chris, Logitech make optical mice too - seem to work pretty well and have drivers for OS 9 and X. I have more or less stopped using my cordless Logitech because it eats batteries, but when I do use it, it works well. Also like my Kensington Pocket Pro - those go on sale occasionally. Saw one recently for $19.99 in a CompUSA ad. All sold out when I got there though.