I forgot the web name, but if you searched well enough you can find it.
But a complete island? I guess you need to cash out a lot of bitcoins to buy that.
I think we are past the stage of really crazy things for bitcoin already.
I've purchased a boat 2 years ago with bitcoin, I just got lucky with that one since the guy knew of it and accepted it for the trade.
Saw someone bought a Tesla with bitcoin: http://money.cnn.com/2013/12/06/autos/tesla-bitcoin/
Private flights into space: http://www.space.com/23732-virgin-galactic-bitcoin-spaceflight-payments.html
Property: http://www.wsj.com/articles/lake-tahoe-property-sells-for-1-6-million-in-bitcoins-1407534997
Not to mention the pizza that was bought for 15,000 bitcoins back in the day...
I want to see non crazy things, like gas stations accepting bitcoin at the pump. The only thing close to that is using Gyft to buy Walmart cards and buying their gas.