Pirate festival costume help! See details.

We’re going to the annual Pirate Festival tomorrow, and I was rather suddenly informed that this time, we were to try to wear costumes.

I realized at that point that I own nothing even remotely pirate-like.

So I decided to go dressed as a data pirate (and wrap a bandanna around my head). I’m looking for things that would make my theme somewhat more obvious, and that could be assembled from the parts commonly found lying around in a house with too many computers.

Any suggestions?