What about all the people that opted into beta that have yet to receive an invite to the beta?

It feels kind of unfair to not be invited to beta, and then have "friends of people in the beta" being invited before those who opted in and haven't yet been invited.

Any chance another wave of invites will go out along with the "friends" invites?

You require more friendSSSSSS!

But on a serious note - yes, we will keep inviting people, who opted-in, don't worry :)