Hi! We are very glad to tell you that alpha testing is started!
The testing will be sorted by waves. If you already signed up for it, go and check your email! Don't worry if you didn't find an email from us! Maybe you are not in the first wave of testers and will get your access a little bit later when we fix first bugs.
You can still sign up for the alpha here:
http://eepurl.com/cEbJqD