The only thing that disappoints me is that there isn't, nor (to the best of my knowledge) has been, any Doomsday Arcade merchandise. It's by far my favorite series I've seen on this site, and had so many opportunities for purely epic things.
Like a tee-shirt with Bruce's heart-grenade X-ray.
Or a Laser Cat plushy.
Or a mask resembling the Dice Lord's head.
Or a tee-shirt with the quote "Whiskers on kittens!" and a creepy example on a stick figure head.
Perhaps even a miniature version of Polybius.
[EDIT]Or Shanks' tie. Hell, I'd kill for one of those... [/EDIT]
If only there was something like that in the store.
It might actually have give me reason to bugger my parents long enough into getting me one. The Zero Punctuation stuff has been there for ages, and the underwear........ eeeehhhhh...... I'll pass.........