Theres this search engine called tineye where you can give it an image and it scours the web for it and they have this add on for firefox where you right click an image

its really funny when the image leads to some embaressing site ive even seen a few anime avatars lead to hentai sights 😛

http://tineye.com/

Nice find. Love the add-on for Firefox.

Now that's cool. I can already think of uses for this.