If you listen to the solo starting at 2:50, it almost sounds like a compressor the way the notes just seem to sustain, but I'm pretty certain that he didn't use compressors. Is that just a delay pedal?
http://www.youtube.com/watch?v=830_e6tD8Fw&playnext=1&list=PL343E62F5FE7527B2&feature=results_video



