From Kotaku:
Panic has seven T-shirts available for purchase designed by Katamari Damacy creator Keita Takahashi and Ryo Kimura. All of the shirts are $25 bucks and besides the Katamari soundtrack these are the only licensed items Takahashi himself has ever approved. We’re hearing that quantities are pretty limited so if you think you know someone who may need one for the holiday now is the time to order. That last line felt like an infomercial, I’m sorry.
I ordered the brown one.
Update (16/09/05): The t-shirt image that was in this post is no longer available, but I do still have — and wear — that tee.