Here's Gavin talking to ABC Radio's excellent PM Show in Australia.

http://www.abc.net.au/pm/content/2011/s3240179.htm

GAVIN ADRESEN: Bitcoin is really a pure money. It's a store of value and a means of exchange and that's all it is. It's almost a plutonic ideal of what money is, in that there is nothing backing it beyond the fact that it's useful as a money.