The Battleship New Jersey Amateur Radio Station is sponsoring the Museum Ships Weekend Event on 5-6 June 2010. The goal of the event is to get as many museum ships on the air on amateur radio frequencies as possible worldwide. Information concerning the event is available here:
http://www.nj2bb.org/museum/index.html
Clubs and organizations participating in the event may be looking for additional hands to assist in various ways, so if you live near one of the participating vessels you might be able to participate regardless of whether or not you are an amateur radio operator.
Even if you are not interested in the event itself, the event announcement has an interesting list of vessels (along with websites) that you might want to visit.
Good hunting!