Looking for a simple third person camera script

I need a third person camera script if anyones got it. I want it to stay the same height and distance from the character. The catch is that I would like it to drag a little so it has to catch up with the characters rotation. If anyone has anything close please Help me.

after upgrading to unity 3 I found they have included a 3rd person script - and the lagg is done with a function called lerp or slerp (I cannot remember witch is for rotation)

If you want a spring camera script, you can download the lerpz tutorial series. It uses one that would be a good starting point.