Tom Morello isn't a technically superior guitarist by any means... but his pedal board is overloaded with effects that he uses very well... Perhaps he's the best at innovating the use of effects since Hendrix......

He uses his killswitch that's on his guitar a lot as well...

But yeah... I have a hard time listening to his solos sometimes. They're not all THAT hard to emulate once you sit and tweak around on a multi effects processor... he uses a lot of flanger, phaser, volume swells, whammy, echo, delay.... all to the extremes.