Apparently, ITP will let just about anyone teach these days...

eTonal Media, Inc.
eTonal Media is the company I started based upon my research in music and social community at ITP. Its main media properties are:

• WholeNote.com
  An on-line community for guitarists

• ActiveBass.com
  An on-line community for bassists

• ActiveMusician.com
  An on-line retail musician store

Music Articles
A few things I've written about learning to play guitar (or any instrument for that matter), expanding one's musicianship, playing in a band, etc:

• In The Beginning: Why I Started to Play the Guitar
• Getting Started on the Guitar - A Beginner's Guide
• Learning to Play By Ear
• Growing as a Musician - Raw Talent vs. Hard Work
• Practicing and the Importance of the Groove
• How to Start a Band, Part I
• How to Start a Band, Part II
• So You Want To Play Jazz? Part I

Guitar Lessons
Some of the on-line guitar lessons I've published:

Getting Started on the Guitar • Tuning Your Guitar Basic Guitar Chords • Basic Major Chords (C,A,G,E,D) • Other Major Chords in Barre Form • Basic Minor Chords (Am,Em,Dm) • Other Minor Chords in Barre Form Guitar Strumming • Strumming Technique • Adding Hammer-Ons to Your Strumming Basic Guitar Scales • The C Major Scale • The A Minor Scale Basic Guitar Techniques • Hammer-On and Pull-Off Technique • Introduction to Slides • Introduction to String Bending Rock Guitar Lessons • Basic Rock Bends • Rock Chordal Ideas • R&B Rhythm Licks • Eric Johnson Style Licks • Jimmy Page Style Licks • Jimi Hendrix Licks Jazz Guitar Lessons • Modes of the Major Scale • All The Things You Should Play • Diminished Licks Over an E7 Groove • Scott Henderson Type Licks

Blues Guitar Lessons • 12 Bar Blues: What is it? • Blues Rhythm Guitar I • Blues Rhythm Guitar II • Blues Turnarounds • Blues Soloing and Basic Harmony • Walking Bass Lines with Chords • Stevie Ray Vaughan Licks I • Stevie Ray Vaughan Licks II Metal Guitar Lessons • Harmonic Minor Scale Basics • Minor Pentatonic Forms • Minor Pentatonic Scale Patterns • String-Skipping Pentatonic Patterns • Open-String Legato Arpeggios • Paganini: Caprice #5 Acoustic Guitar Lessons • Basic Fingerpicking • Blackbird Fingerpicking • Ragtime Fingerpicking #1 • Ragtime Fingerpicking #2 • Maple Leaf Rag by Scott Joplin • The Easy Winners by Scott Joplin • Scarborough Fair Christmas Guitar Arrangements • Deck The Halls • It Came Upon A Midnight Clear • Jesu, Joy of Man's Desiring

The whole enchilada of guitar lessons can be found here:

Christopher Sung's Guitar Lessons