Everyone can get a free account on our Pond server. Pond (still experimental!) realizes a new form of asynchronous message exchange (like E Mail), but with OTR encryption (like XMPP/OTR) and no visible metadata at all - so you can have totally secure, anonymous communication that will not allow adversaries to generate any form of communication profile between peers whatsoever.
We consider this to be the next-generation email protocol. The address of our pond server is: