Blogs
ryancoleart.com - art and illustration by Ryan Cole
http://www.ryancoleart.com/wordpress
A sketch blog by illustrator Ryan Cole. Mostly full of sketches and their accompanying anecdotes, a few tutorials and articles about digital illustration.
The Internet Marketing Blog
http://www.theinternetmarketingblog.org
A source of free information for online marketers. Regularly updated with articles on SEO, pay per click marketing, blogging, reviews of helpful products, and more.