Best place to start is the beginners sections:

http://www.guitartricks.com/beginners.php

http://www.guitartricks.com/guide.php

Then check out the Guitar Tricks instructors.

http://www.guitartricks.com/instructors.php

Each one has a couple of free lessons on their page.

Sign up for the monthly newsletter too. Each issue has a bunch of free lessons and other kewl links. :)