InertialScroll

Used scrolling on your iPhone/iPod/iPad?
Jealous of the early-2010 MacBooks and its fancy inertial scrolling capability?
Get this utility to add the same to your MacBook, you'll wonder how you scrolled before...
This should support any MacBook with a multitouch capable trackpad.

I don't have all the different MacBooks to test with so give it a try. Let me know your results. Works on my mid-2009 Unibody MacBook Pro.
Tested on Mac OSX 10.6.4, should work on 10.6
The scrolling is not perfect, but it is still very good.