On my Ubuntu Laptop (a Thinkpad T42 hand-me-down, which runs great!) running Ubuntu 9.10 Karmic Koala, I just happened to come across an awesome Trackpad mouse setting. (Yes, good things can happen at 3am.) This allows Two-fingered scrolling, just like the scrolling that I have come to adore on my MacBook Pro!
This is a feature that made me fall in love with on my MBP, and I instantly missed when on any other computer. I seriously became addicted to using it within an hour! I always assumed that there was special trackpad hardware needed to register a two-finger swipe! Turns out that it just needed to be enabled.