I have not done my research, unfortunately, but do the new 2010 Macbook Pros use the same trackpad hardware as 2009 Macbook Pros? Yes; There are several third party applications for momentum scrolling on the 2009 Macbook Pro, but those drivers require pay for inadequate drivers (not really a "clean" scroll... It does not really correlate with how fast I scrolled on my trackpad in a sense.) Seeing how Apple has still not integrated inertia abilities into the 2009 MBP, is it possible to use drivers from the 2010 MBP on a 2009 MBP?
Probably not, but I can hope
Probably not, but I can hope