Two-Finger-Scrolling with pre-2005 PowerBooks and iBooks implies that the new Powerbook trackpad feature has been a part of the older powerbook hardware for a while now.

I am curious to compare this to SideTrack, which I have found to be so-so, although I do use the feature a great deal. The microsecond delay before it accepts scrolling input combined with the (still!) mysterious mouse gestures in Firefox make it less than the smooth and upholstered ride I’m used to.

After all, I’d hate it if a bump in the road caused me to, say, spill a martini into the keyboard.

Another possible widget is uControl.

UPDATE: As of February 13, the site linked above is down. I was able to download and install the new driver and find that, yes, it sure is better than Sidetrack. I will be continuing to try it out for the next few days.