yes there great sites
chordbook is excellent, use it myself sometimes!
just wikipedia for histories of the famous models ect. that used to be hard to attain info once
re tab - I remember the full *quality stuff* transcribed sheet music to just one song could cost $30+ dollars in the 80's!
ive seen some great lessons and vids/info here too
http://www.guitarplayertv.com/
although you do have to watch small ads before you get to see what you click on