If you like good old cartoons, the ASIFA Holywood Animation Archive is a great source. They have an excellent blog with historical photos, drawings, pencil tests and shorts from all era's of animation. If you live near LA or you probably should go visit, it sounds like you can see all sorts of hard to find animated shorts, like the notorious (due to obscene to the point of parody racial stereotyping) Coal Black and de Sebben Dwarves. With a bike frame grab no less:
Click for source and full image
Check out this post for some nice popeye, betty boop and some terrytoon shorts for download and some background on the Archive.
if you really enjoy animation, the Looney Tunes Golden CollectionDVD's are really spectacular. All the Bugs, Daffy, Porky, Coyote and Roadrunner, etc. cartoons you remember in uncut form, lots rarely seen before. Really nice commentary and analysis by animators. Good special featurettes on each disk. Really good stuff. My only complaint is that I believe many of the shorts were originally not at TV's aspect ratio, thus there is some clipping at the edges. Some shorts are sort of letterboxed, but most are not. Otherwise a great thing to have for anyone who really enjoys Warner Brother animation.