Here are  a few sites I regularly visit. Check 'em out.

http://www.myspace.com/kentjenningsjazzguitarist
(My MySpace page)

http://www.ourstage.com/fanclub/kentjennings
(My OurStage page; includes my electronic press kit)

http://www.reverbnation.com/kentjennings
(My ReverbNation page)

http://www.artistshousemusic.org/home
(Excellent video interviews with industry professionals on various topics. The longer you stay, the more you'll learn)

http://www.secondhandsongs.com/home/
(Ever wonder who originally wrote that song, or who covered it?)

http://www.harryfox.com/public/index.jsp
(Get your licensing and royalties setup through Harry Fox)

http://www.jguitar.com/chordname
(Great online chord and scale reference!)

http://archtop.com/ac_inst.html
(Got money? They've got an archtop guitar for you)

http://www.jazzguitar.be/
(Go on, take a deep dive into Jazz guitar... you won't regret it)