Here’s something you might not know. Mt. Gox was founded by Jed McCaleb as an exchange for the Magic: The Gathering card game (hence the name Magic: The Gathering Online Exchange). By the time it was sold to Mark Kerpeles in 2011, it had already transformed into a bitcoin exchange — going on to eventually handle 70% of trading transactions worldwide.

Today, the exchange is facing their share of problems, but McCaleb’s carrying on — and today, he’s announced a brand new project.

We can’t tell you about it because we don’t know what it is, because it’s top secret. Really.

McCaleb has registered the domain  (the WHOIS information for the domain checks out, and Jed has confirmed to newsBTC that this is a legitimate project), and therein is a call for alpha testers, and not much else:

When I sold Mt. Gox a few years ago, Bitcoin was trading at less than a dollar. Today Bitcoin exists in a new environment. Mt. Gox is struggling to keep up. Now, I am building something that will be better for Bitcoin and better for you. I’m looking for alpha testers.

Behind the text sits an image of planet Neptune, which may or may not be a hint of the project’s name. Certainly, it’s interesting to see Jed come out of the blue with this. Could he be building another bitcoin exchange? Let us know what you think he’s up to in the comments.