I spoke with Support today about how to make the Logitech Mouseman scroll wheel act as a middle button. It is apparently not possible at the moment. My particular use is in DataCad CAD software. The middle button (Scroll wheel) on a 3-button mouse is used to "snap" to a point, intersection, etc. There is a keyboard way to do it, but I am used to using the middle button. So, I am hoping that, as Parallels continues to be improved, some attention can be given to the mouse issues. Before I installed Parallels, I tried Fusion, and the mouse operation made it pretty near impossible to work on Cad with it. My experience so far with parallels is far superior.... so I hope it continues to evolve.