The Heroes V producer announced that the beta test is ready and should begin today. He said that he would tell us when the acceptance emails are sent, so that you don't have to keep an eye on your mail inbox (but we will do it anyway, won't we?).

Some time ago, it has been mentionned on the official forums that there is a way to see if you have been accepted or not. Check out the Permissions section of your profile, and look for a reference to a Closed Beta forum. If it is there, chances are you have been accepted (remember that you cannot tell other people about your participation to the tests). Good luck to all Heroes fans out there.