Why not just download the image and then upload it to tinypic.com and then use the link they give you. I can't speak for the legality of hotlinking to an image that is on another site, but I can tell you that they can easily see that you are doing it by checking their stats. And finally, you are always subject to getting into hot water by the unathorized use of anyone's images. If you want to take the risk then be prepared to pay the consequences.
"Wiz"