Like J.K. Rowling says in the video,
Pottermore is going to open in October with some amazing new Harry Potter interactive experience, I can't wait! I managed to get a spot for early access today, and there are only two days left for that. The slots clear out really fast, so if you want in on that before October you'll have to be on the lookout and be quick!
For those who do manage to get one of the million early access slots, the beta opens in a few weeks I guess?? Not at the same time for everyone, though.
Anyway I am really excited for this!