Rivers Cuomo's guitar tone/sound

Was at a friends house listening to some Weezer and i just loved some of the guitar sounds this guy has...he was using a wah wah but also had a great intense (yet clear) distortion...i was listening to a mixed c.d. my friend made... he told me the songs were from their new album, pinkerton , green, and blue albums....anyone familiar with this band and or him? he's a great guitarist....and i love his sound.