Middle-mouse button scroll mode

Hello,

A quick feature request; one that I would hope isn’t too difficult to implement. I love the scrolling mode that you get by pressing the middle mouse button - on Mac and PC. The problem is, specifically on Mac, more and more features of the OS are being built into gestures.

I use a scroll wheel/middle click enabled mouse at the moment, but would like some of the benefit of gestures on Lion from a Magicmouse or trackpad. MagicPrefs gets close, but it’s still flaky.

The smooth scrolling/dragging mode that you get from the middle mouse click is brilliant - would it be possible to add this scroll mode to be accessible via a key command too, for example pressing ctrl+shift whilst dragging the background? I would imagine most people, definitely most Mac users, don’t even know this scroll mode exists.

Best,
D