I just moved from Dos To Mac. On my old laptop I could configure the touchpad to "glide" with the synaptic driver. That is the pointer would continue to move a bit after I lift my moving finger off the touchpad. Is there a way to achieve the same thing on Mac OS X? It kind of simulates a track-ball.
I have tried to find a solution to this problem for years now. There are three answers to this question, and none will make you happy:
Create custom touchpad drivers yourself
Sadly, this is the only sure way at the moment to get inertial pointer on OS X.
Create an incentive for somebody else to create custom drivers
Send emails to BTT, Overdrive, etc. Comment on blogs that talk about inertial pointer on OSX. Talk about it on Twitter. Upvote posts about it on StackOverflow.
Buy a trackball
Trackballs have natural inertia. You can flick the ball and it will keep gliding as the ball decelerates.
PS. Here's a way to try what inertial pointer on OSX would feel like.
There is a bug in OSX 10.8 that can trigger inertial-like behaviour.
Grab a window by touching the window header using three fingers on the touchpad.
Move the window just a bit while keeping all three fingers on the touchpad.
Now, use a fourth finger to flick the window around.