It's great to hear so many people are finding their photos!
And here's yet another tip...TinEye.com is a new beta service that searches the web for your photos. To sign up, you have to request an invite, because they are maxed out at the moment. I've sent mine in...let's see if I get in!
Shutterstock Photographer Forum :: View topic - This is kinda cool, new way to find your images in use.