Just a heads up, various copyright registration filing fees are going up today, May 1st. The one that will affect most photographers is the standard filing fee for collections of unpublished work, which is rising from $35 to $55. If you have one photo, by one photographer, then it stays at $35, but if you do as Jack does, registering hundreds or thousands of images at one time, be prepared to pony up an additional $20. Even at $55, it’s still the best protection you can have for your images and we encourage everyone to register everything.
You can read more about the increases at http://www.copyright.gov/fls/sl04.pdf