From the newsletter today:

 " We will be announcing the sale page url shortly before the start of the token sale (February 1, 8am UTC). Get notified via newsletter. Only those contributions coming from registered accounts will be accepted, so make sure you register before sending your contribution."

So if I understood correctly we just have to wait and register on TGE-day and then send our contribution? I mean there is no way to register anything already, like mail, name eth address etc... right?