Check engine, Speedo, and Odometer

On the way to work today I look down and see that the Speedo and odometer aren't working. Not really that big of a deal since now it's not registering miles put on the car. But shortly after that the dreaded "Check Engine Soon" light comes on. Then getting off the freeway the idle is all over the place, bouncing from 300-1000 rpm. I did race it at Infineon last wednesday but it ran fine for the past 5 days. I'm going to track down an Autozone but wanted to see how many hit's i could get to maybe fix it myself. I'm going to go out and unhook the battery for a while and see if it will clear itself.

Any other ideas????

I know the process to use the odo as a didgital read out for other things, but the odometer isn't reading out at all. It looks like this ----------.

BUMP!!!!!!!!!!!!!!!