Another good idea would be to be able to have and sell your site's play money for Bitcoins.  I remember there was a market once for Pokerstars play money.  It didn't pay much but the market was there and there were lots of people buying and selling them.  Maybe it would be in the best interest of Bitdice to start something like it.  As long as the people keep playing in the site whether it's for play money or for real money would be good for the site.