We made up a few parrot t-shirts via Cafe Press and got them signed for the YAPC::EU auction. They're neat enough that we've just thrown open the store to anyone that wants one, though they won't be signed like the auction shirts were. Here is where they're at, if you want.
Proceeds, such as they are, go directly to The Perl Foundation. The logo is courtesy of Andy Wardley. (And yes, we'll probably have rainbow parrot mousepads or mugs or something soonish :)