http://www.tineye.com/

This is something Roo from MFGG showed me a little while ago. It's sort of neat - it allows you to upload a photo and see all of the pages on the Internet it's posted or linked to. TinEye is also able to recognize photos similar to the one you've uploaded.

tbh i always thought it was called tinyeye lol

I found this a couple months ago and thought it was the coolest thing, then forgot about it. Thanks for bringing it up! It's a good way to identify if an image is truly one-of-a-kind or just copied from somewhere on the Internet, lol.