links.

Joshua Myers:
http://www.joshuamyers.com

Matthew Garrison:
http://www.garrisonjazz.com

Geoff Shell:
http://www.geoffshell.com

Matthew Llewellyn:
http://www.matthewllewellyn.com

MusicTheory.net:
http://www.musictheory.net
A fantastic and free music theory and lesson site.