I noticed a few days back that Google+ updated their invitation options and showed now that there was a limited number of invitations remaining for each user.
I thought this was interesting because of the fact that we had unlimited invites before. When I went to invite someone today I noticed they are now offering invites through a url, where they once required you to put in the email for each person you wanted to invite.
So I have about 149 invitations left to allow users to sign up to Google Plus and figured I would share them with my readers.
If you are not yet on Google Plus, use this link and sign up now, but remember, they are limited so act somewhat quick if you want one.