The Castlevania title has been rated by the Australian ratings board. http://www.nintendoworldreport.com/newsArt.cfm?artid=20600 Australian ratings board OFLC has rated Castlevania: Rondo of Blood for the Virtual Console, with Nintendo as the publisher.
The original game was a TurboGrafx-16 CD title that was never released in North America. The game was then remade for the PlayStation Portable. That title included the original version in English as an unlockable bonus.
No release dates have been confirmed, but a 2010 release in North America seems likely at this point.