alt.guitar
alt.guitar.amps
alt.guitar.bass
alt.guitar.beginner
alt.guitar.effects
http://groups.yahoo.com/group/guitar-playbacks
alt.guitar.tab
rec.music.classical.guitar
rec.music.makers.guitar
rec.music.makers.guitar.acoustic
rec.music.makers.guitar.jazz
rec.music.makers.guitar.tablature
uk.music.guitar