I found a great post titled Guitar Reading List v3 and Instructional DVDs over at Striking the Right Chord, If You Can Find It.
I haven’t had the chance to read all of the books on his list, but nevertheless, it is a great list. One book I must agree on is his number one [...]

When learning songs from written sources like instruction books or online files there are three main forms of written music for the guitar. The three types are chords, tablature, and music notation. Each form brings its own advantages and each form is a bit more complex than the last.
Chords

Probably the simplest form of documenting a [...]

iRocker is a little program for your iPod that has a whole bunch of essential guitarist tools. The software package comes complete with a guitar tuner, chord dictionary, scales, metronome and riffs practice program. The chord directory has over 200 essential chords with correct fingering illustrations. It even lets you hear the chord. The tuner [...]