Writing.com - a place where writiers of all levels and genres come together to share their work and hone their craft. It's a great place to find a good read, too.
Lynda.com - Want to learn about some software or another? Lynda.com is a great place to go to expand your knowledge of a wide range of topics.
Zaxwerks - Cool (and affordable) 3D software and graphics tools for motion graphics and other applications.