The original with the compiler's justifications for their positions is here

http://www.rollingstone.com/news/story/5937559/the_100_greatest_guitarists_of_all_time

Rolling Stone later published a 25 most underrated list
http://www.rollingstone.com/rockdaily/index.php/2007/10/01/the-twenty-five-most-underrated-guitarists

I claim no resposibility for any ofthese opinion!

Dave.