This just came in from BoatUS:

Since federal documentation is required by most lenders to record liens, now is the time to document your recreational boat. BoatU.S. provides this service and handles all the paperwork including contacting former owners, dealer/brokers, and banks. BoatU.S. is now offering a special 30% off discounted cost of $350 ($50 additional for lien recordation) to document your boat. Boats must be at least 27 feet in length and kept in the continental United States and owners must be U.S. citizens. There are additional fees that apply for boats purchased through bankruptcy, estate, trust, and repossessions. Please visit http://www.boatus.com/documentation/ or call 706-869-8241 if you have any questions.