Check 'em out! (I guess you need a DiVx plugin to see them? www.divx.com)
Note the suspension in the first video as the Range Rover runs over the dead bodies ;-) That's my favorite part.
http://www.radioactive-software.com/gangwar/GangWarPhysicsEarly1.avi - 9 MB
http://www.radioactive-software.com/gangwar/GangWarPhysicsEarly2.avi - 17 MB
Police Car doing burnouts in a parking lot, here's a preview image:
http://www.radioactive-software.com/gangwar/GangWarPhysicsPolice1.avi - 11 MB
And a longer video showing more of a gameplay situation, fast driving/turning, also showing the different handling of 4 different cars.
http://www.radioactive-software.com/gangwar/GGangWarDrivingTest1.avi - 35 MB
The framerates could be better, but my damn computer slows down whenever I try to record a video :-( This also causes some physics inaccuracies, but it's not too bad.