I don't think so. Asked a few people who has access and some even work inside Google--there isn't an invite "box" yet. It seems like Google is keeping it tight on this beta. But in the words of Principal Seymour Skinner: "Prove me wrong, children! Prove me wrong!"

Not even all Googlers got an invite, they are keeping it very locked down.

I have access but I looked and found no invite button. Also, I don't find all Googlers in there, which is weird because I'm one of most lowly Googlers (new, young).

I hope that at least everyone on the Google+ team got an invite. Lol.

I`d be pretty upset if I put so much work into something and wasn`t even allowed to use it.

I would be stunned to learn that anyone on the Google+ team doesn't have an invite since I'm not sure how any member of the team could work on a product they don't have access to.

invitations were suspended due to "insane demand". It will be opened up again as the field trial progresses. The service is still being built.