Brickfilms. Michel Gondry brought LEGOmation into the spotlight with his "Fell in Love With a Girl" music video (White Stripes). However, LEGOmation has been around since the late 80's, the first known brickfilm being Lindsay Fleay's The Magic Portal.
The LEGO animation process is painstakingly long: creating the set, moving the LEGO men, snapping the photos, importing the footage, editing, etc. However, the end result is plenty rewarding... here are a few HowTo's if you're up for the challenge.