Holland America has a "circle Hawai" cruise April 22, 2006 on the Volendam that sails from Seattle and returns to Vancouver: http://tinyurl.com/95qlg

There's one Vancouver - Vancouver in April 2007, and many more in 2006-07 that sail and return from San Diego. See this URL and click "all for Hawaii": http://www.hollandamerica.com/dest/dest.do?dest=H

Cheers, Pat