I looked into flying to Hawaii and getting married on the beach..There are several beaches/ locations to choose from. It was super cheap. The prices for the packages started at $100. and that included a few pictures, wedding, and paperwork. The prices went as the package included more things. By far was that the cheapest way to go. Hotels are not that expensive, but the flight will bite your wallet $1300 est pp.
I found a realy cool cruise ship. I think we might end up doing this. It is pretty pricey but with my employee discount it's about $3000 off per person.
http://www.starclippers.com/ships_scsf.html