Hey Prelude99,
I tried to email you, but I got some error messages. I got your email. To answer your questions:
I did not get your original email, my work moved from DC to Virginia about a month ago and our computers, networks, etc are different. My home computer is kaput, so I lost any emails from Dec 13 until today.
My car still has a shaky idle. Other than that it runs fine. I was surfing over at s2ki.com and someone over there said one of the first signs that you need a valve adjustment is a lumpy idle. My 'Lude has 62K and I have not had the valves adjusted yet.
The last tank of gas, I got some Sunoco Ultra 94 octane. After filling up, I ran the car hard for 20-30 miles, staying above 5K rpm between shifts, and keeping it in 4th instead of 5th on the hiway.

That seems to have made a difference, the car seems to idle smoother and run better than before. I think the next couple of tankfuls, I will use some fuel injector cleaner and see if that does any good. If you find a soultion, let me know!