Didn't even know this existed until today. Bung the URL of a picture in, and it'll find out what it is for you. Useful in the "Images" thread.

http://images.google.com/

*Press the little camera in the corner.

good find that mate, 1st i've heard of it too,cheers

NICE ONE ...

useful that.

I like this, cheers mate.

Thanks for the tip!
Very useful to track sources of some pics!!

Brilliant find mate.

Theyve had a phone version of it for quite a while...snap a picture and it does the same.

Really handy, nice one for posting. As said, Does wonders for the picture thread

Nice one. I knew of another site that had been doing this for a while: http://www.tineye.com/

Perhaps it'll come of use sometime when google doesn't get a hit.