Well, just read the new regulations. Here is a link to a Slash Gear article about it -
http://www.slashgear.com/faa-gets-tough-on-drones-with-mandatory-uav-registration-14418286/
And in a week the Registration site goes live and here is the link for that -
http://www.faa.gov/uas/registration/
Not thrilled about having to registering, but it is not unexpected considering how much hype the press has given the few bad apples out there.
Just a suggestion for the forum mods, you might want to make a stickie for the registration website to make it easy for visitors to find the site.