I've been trying to figure out what effects Taylor has going for some songs, in particular "Masters of War" and "I and I". Unfortunately the only place online where a clip can be heard is on Amazon under "listen to samples". Check out the first few seconds of "I and I": http://www.amazon.com/Real-Live-Bob-Dylan/dp/B0012GN3A0

Sounds like some combo of reverb and some sort of modulation effect. Maybe a uni-vibe or chorus. Not sure. Any ideas?

Sounds kinda like a wah to me, but I might be completely wrong
Brian May Red Special
Vox AC30C2
Electro-Harmonix Big Muff Pi
Rothwell Hellbender
Vox V847 Wah
Boss DD-7 Delay
Fryer Treble Booster Deluxe
I know Taylor used a Wah a lot live. He sets it in a position and uses it to get certain tones. I feel like there may be something else going on there too.