Could this be the ultimate in luxury cruising:

<a href="http://www.ussubs.com/lead.html" target="_blank">http://www.ussubs.com/lead.html</A>

Make sure you check the "luxury" models.

The sub site also has this link to an underwater resort that is being planned:

<a href="http://poseidonresorts.com/" target="_blank">http://poseidonresorts.com/</A>