Thanks all!!

When I start my car the light goes out as normal, but only when I
drive it does it come on. And it seems to be a variable time length
before it comes on. I would say it is deffinetely linked to motion.
Also, my CV axles went bad and I drove those things into the ground.
When I finally changed them out (I wish I did not wait as long, but I
was broke) the boots had torn apart and grease was EVERYWHERE. I had
to clean off all the accumulated crud off the speed sensors, so maybe
there is a situation there. I also hit a curb quite a few years back,
so maybe the knuckle is bent slightly and the sensor drifts from the
ABS teeth on the CV joint, I can't really recall which came first here,
the ABS problem or the curb problem. I'll try to get the car up in
the air again this weekend and have a look at the sensors. I'm also
hearing some noise coming from the back brakes, so maybe the problem
lies there.
I'm having over-heat issues as well, so I don't know when I can get
to it. I'm guessing by the behavior that it is the thermostat, so
that may not be a time consuming issue.

Thanks for the suggestions..