The only reason that Google+ was announced was that this process couldn't have been done in secret. I'm sure if there was a way to have got everyone in at the same time, they'd have done it.
Either way, having a closed invitation has genuinely made me more interested in the product.
What about non-Googlers? I feel like there would have to be some sort of algorithm that did it for you, what with how many people use Googles' services.
Have not figured out how to send messages to my friends, or do I have to share something only with them?
The "Limited"/Public link to view who you shared something with is kind of hidden, would be nice to see which circles a share is visible without clicking something.
There is actually not very much I can do right now. I click on cirlces, yeah it is a nice interface. A lot of my friends dont seem to understand how to share content with me even after they added me to a circle. Not much happens at all.
Yeah, I think that's how it works. There's also a chat box on the left, which could be used for similar purposes.