I did get an invitation to Google+ yesterday, so I may be speaking from a place of privilege (please read that with a flippant tone), but I guess I’m not sure what all the hand-wringing over the closed system of invites is about. That’s the way a lot of new products are introduced, and it helps keep the focus on getting the product ready for use by a critical mass of people rather than on supporting early users.
Plus (see what I did there?), can we be candid? This is obviously about marketing, too. Limiting access to the system builds curiosity and buzz (see what I did there?) and virtually ensures demand.
Don’t worry, this phase won’t last long. Before you know it, you’ll have your Google+ account all set up and then you’ll go back to playing Farmville in Facebook.