(Re-)Update: after being boingdotted and shackdotted simultaneously, the server became slow as molasses as other sites picked up the story and run with it. I temporarily downsized the images and clamped down traffic with a magic incantation along the lines of iptables -m limit --limit 2/second --dport 80 --syn -j ACCEPT, but external referrals are now being redirected to a static page.
It took no time at all for someone else to hack the TGA file, with hilarious results:
...but if you'd rather poke fun at Batman, you can try this:
...or, if you're a Thundercats fan:
Here's the Polycount thread where I picked these up, in case someone posts more silliness.