Adding more people to Google Plus

After Google blog post and opening of free Google Plus registration there is an 'overhelming demand' to get into G+. Google switched off the Create account page (after being online for about 60 mins) and it's just collecting emails from wanabe plussers.

But how to get into by some other way?

There is one possibility but you need the help from insider:

To invite friends, you can simply forward your invite mail (the one you received to get yourself invited) to your friend who you want to invite. (via kunal gupta's blogpost).

That's how I got in, anyway.