TinEye.com private beta (Search for images with an image.)
Just as you enter text in Google to find web pages that contain that text,using TinEye, you enter an image to find pages where that particular image (and modified versions of it) appears.email to request an invite.
http://tineye.com/login

May 14th, 2008 at 9:58 pm
Hy Tony.
Do you have some TinEye invite yet?
Thanks in advanced,
reply to DmyanDmyan
May 14th, 2008 at 10:54 pm
@Dmyan no sorry i’m on the waiting list for an invite
reply to tonybls12May 15th, 2008 at 12:46 pm
@Dmyan i signed up for the tineye beta here
reply to tonybls12http://tineye.com/request_invite
and got the invite the next day.
the search works very smoothly, just upload your image and it will show you all the sites that have used it and even find some that have alterd it .great way to keep a trac of who is using your pictures and how.