What are those mini gifs really called and where can I find them?!?

I think it's cute when people use those little pictures in their myspaces or other websites, but I don't know what they're called exactly, and so, I can't find them.

One example is this: http://i232.photobucket.com/albums/ee30/...

...and I found that because I googled "mini gifs" and found 1 site with little food ones. Do you know what they're called and where I can find a lot of these? Thanks!!!

What are those mini gifs really called and where can I find them?!?

They're called pixels,

and you can find some here

http://www.xanga.com/Pixel_Drive

:)