I have been doing more research into art marketing and there are a lot of places to find great information. Once of my favorite blogs is Crafting an MBA. This blog is very regular and interesting and has shed light on many amazing resources on the web. I really love the weekly roundup done by Megan Auman which include a sampling of pertinent art marketing information.
While reading her most recent update discovered Kesha Bruce who has a great art marketing podcast called ARTFIX. Her positive attitude and experience as an Artist and Gallery Director make her information very in depth from all perspectives.
I have also been enjoying the blog by Tara Gentile, she has been doing some great posts about pricing your art.