I have also noticed flickering lights, seems more pronounced when the brake pedal is pressed (with brake lights on). Seems almost like a grounding issue. I also don't notice other lights flickering, only seems to be the guage pod. I was going to bring this up when I bring my car in for a replacement glass on the passenger door.
gja,
I am interested in your radio installation success, I would be curious if you get fuel pump noise at unacceptable levels. I had my Mountaineer fuel pump fixed under warranty for this issue, Ford has a EMI filter kit they install. There is a TSB on it, not sure if it extends into 2003 cars. Maybe they changed the fuel pump design?