While I was in Seattle earlier this month I took the opportunity to pick up some mice and keyboards. I got a Bluetooth version of the Arc touch mouse which is really nicely designed . It lies flat and you turn it on by folding it into an arc. Hence the name. It's more comfortable than I expected and it works very well. There's no scroll wheel, but the touch area in its place is a usable replacement. The mouse contains a sounder that "clicks" as you scroll up and down providing good tactile feedback. It's a bit pricey, but it does have a nice premium feel and the way it snaps flat is very pleasing.