StopMotionAnimation.com – A community-based site focused on stop motion in general, usually leaning more toward the more common latex/clay armature-based puppets. A few professional animators frequent the forums too.
YouTube – A humongous worldwide digital video repository filled with just about every video seen on TV, the internet, and then some. This is a great and commonly used resource for uploading your films if you lack webspace.
BrickArms – An online store where you can buy custom weapons, weapons packs, and custom minifigs. Features a wide selection of firearms and other war accessories that fit perfectly with LEGO minifigs.
Flickr – A very professional Web 2.0 image-hosting site that offers both free and cheap image hosting packages. The free package limits the number of photos uploaded a month, but the very cheap Pro package allows unlimited uploading. A very popular site with LEGO fans, many of which have migrated from the somewhat flawed Brickshelf. Highly recommended.
Sound Effects Libraries
SoundDogs.com – Hundreds of thousands of sound files. You need a particular, specific, sound effect? some Royalty Free Music? Samples and Loops? Vocals ? chances are you’ll find it here. Searchable by category, very handy.