Here's a little example I made http://dl.dropbox.com/u/1412774/cargame.capx.
<img src="http://dl.dropbox.com/u/1412774/screenshot.png" border="0">
It's a micromachine like game, where I want the car controlled by the computer to have a plausible behavior. I used a series of waypoint, but I can't get the physics to create a lifelike movement (I even have problem with the angle at the start of the game...)
I use to "dummy" object to store the values of the previous and next waypoint.
(and by the way, I don't own any rights for the image used as background, so don't use it for any commercial stuff, I can't give them to you !)