good idea.. and hand over to each of (or some of) the attandants 1 bitcoin in a wallet on a USB stick so that they can get started and will talk about it when they are inside the Fest
er... handing out thousands of usb sticks... that's gonna be even more expensive than an $1000 official booth. :|
how about a printed pamphlet with some brief intro info pulled from the wiki... some links (including the bitcoin faucet), and call it a day on the distributed materials?