Here is a great site for amp specific tones......but most tones will go for any amp..:
http://www.tonesettings.com/tone/Here is another great site..its got tabs, lessons, reviews, and great forums...(i got almost all of my settings from those forums):
http://www.ultimate-guitar.com/This site tells you what rigs different guitarists use:
http://www.guitargeek.com/