What's In This Bag?

Kevin Poulsen, ex-hacker extraordinaire, posted a teaser image on Threat Level, one of the Wired blogs. He writes:

I’m so excited by this piece we’re running tomorrow, that I’m posting this preview pic to give THREAT LEVEL readers an exclusive chance to guess what the subject is. Here’s a clue: this will be the best thing that’s ever appeared on the internet. Ever.

So what is it? Can any eagle eyes suss it out? Click the image for a blow-up.

Mystery Photo From Tomorrow’s Wired News [Wired]