Bricks in Motion is the center of the Brickfilming community. It's a great place to learn about Brickfilming and showcase your work.
Saber Scorpion's Lair
This is the site that got me thinking of LEGO bricks as way more than toys. It's the personal website of Justin Stebbins, who has a phenomenal body of work in various mediums. There's also a fairly large and active forum attached to the site, rare for a personal website.
Roger Ebert
In my opinion, Roger Ebert is far and away the greatest movie critic ever. His reviews and blog posts are witty, insightful, and always very entertaining.
Sméagol Studios
Philip Heinrich (Sméagol) is a fantastic Brickfilmer and one of my inspirations.