If you teach the guitar, or perhaps you are a good player who would like to get into teaching the guitar, you should check out
http://www.teachlearnguitar.com.
They have lesson handouts, theory instruction sheets, tab and musical staff templates, and more for free. As a teacher, it makes my job a lot easy and fast.
And keep coming to GuitarTricks.com! It's a great online lesson site; the best. I even direct many of my advanced students to augment their lessons from me by coming here and learning more. Enjoy.
Hope this was helpful.
M