Checked a couple sources, and though there's no proof (due to being in a breach of NDA or whatever), a lot of people are saying they got theirs. Troll or not, better to check your email just in case!

Update: https://i.imgur.com/wZIKd.png

How big is the download? Or is that against the nda?

There's been people saying that it's going to take up 40GB, but the actual download being compressed and smaller than that. Makes sense that the beta invites are being put up so that people get to download the beta before their time starts.

Some people have been saying that they are being handed out in waves, so it might take a little bit of luck and waiting maybe a few hours to a day at most. Think of it this way, there's a whole month and then some so if you don't get a beta now, you'll have a better chance next weekend.

I've read that it's about 35GB. That picture isn't my invite, sadly, I saw it posted on Reddit. I'm still waiting on my invite.

Still no party invite for me... /sigh

Guess I'll just have to continue to live vicariously through others.

More invites have been sent out within the last half-hour(ans possibly more to come in the next short while).

From Stephen Reid's Twitter.