OK - here is the situation: I have a '98 SE w/75k miles. I did the 60K tuneup and it went from a slight vibration to none. I was quite pleased with myself. I changed the spark plugs, cleaned the throttle body and a few small things. I've been meaning to do the following when it gets warmer:

Knock sensor
fuel filter
Upper/Lower radiator hoses

So, what is my problem??? About a week ago, I got in the car and started it. I then realized as it was idoling that the car was shaking worse than before the 60k service. Then I thought maybe some bad gas (no, not me - the car :-) ) but that was not it. I'm thinking the KS might be the root, but I wanted to get some other ideas as to what it might be.

Any ideas??
Thanks!