Alright, look. I understand Japan are professional purveyors of the ridiculous. I don't question it. In fact, I frequently enjoy it. That being said, the latest goofy USB to catch my attention definitely goes above and beyond when it comes to the wild and weird. Rinkya blog posted about this cat tail USB, which you can read more about here on the Darumouse website.
The 2 GB version retails for 3,980 yen, but even if you have no interest in this thing, you should browse their website, because there are laughs to be had (and maybe thrills for the neko-obsessed). There's also a cat ear version of the USB, which I can only imagine would provoke some interesting conversation when used in public, and an entire plush USB cat that you can use by plugging his butt into your laptop. Is the little pink cat nose USB next? Cat paw, perhaps? Don't steal my ideas, now, Darumouse. I'm watching you.