From: Theo Markettos on
I have a laptop where I use applications that make extensive use of the
middle mouse button. Unfortunately (for complicated reasons I don't need to
go into) using the laptop touchpad with left+right buttons together isn't
suitable. So I'm looking for a three-button USB touchpad or preferably
trackball suitable for laptop use, ideally with some clip to attach it to the
laptop. I tend to use my laptop on my knees quite a lot, so using a
conventional mouse is out because I don't have a flat surface. It needs to
support the third button natively, ie not emulated by drivers.

Can anyone recommend any? I can't seem to find pointing devices aimed at
laptops that attach to the laptop rather than require use of a desk to use
them on.

Thanks
Theo