Web site Guitar Noise offers a huge knowledge base of free lessons and advice that can take you from guitar novice to guitar god.
Since I am a guitarist myself, I know that a lot of you out there must just be waiting for the right resource. With hundreds of lessons, articles, and an active forum, Guitar Noise could be it. If you feel you learn better with video, you might want to supplement your lessons with some free video lessons you can put on your iPod.
Best way to learn guitar [Guitar Noise Wiki]