One can't be sure what Duane Eddy or Andres Segovia might think of this interactive guide to guitar chords, but hopefully they would approve. Offered up by Chordbook.com, this online guitar chord primer takes novice and experienced guitar players through all sorts of chord variations and possibilities. Visitors can start by looking over the "Help" below the virtual guitar, as it goes over how to turn the capo on and off, tuning settings, and how to store favorite chords via the "My Chords" feature. The interactive guitar is quite easy to use, and visitors will want to recommend this site to friends, colleagues, and other musicians.