Red Sand is a fan film taking place long before the events of the first Mass Effect game.
Pixologic - Interview with Bioware about Mass Effect 3
Pixologic have an interview with several artists from Bioware about their amazing work on Mass Effect 3.
Brian Sum's Concept Art for Mass Effect 3
Check out this gallery of beautiful concept art that Brian Sum has created for Mass Effect 3. (Beware spoilers)
Mass Effect 3 - Extended CG Trailer
Digic Pictures have released the full, stunning 3 minute CG trailer they created for Mass Effect 3.