For my iPhone using friends: the Google+ iPhone app has been submitted to the App store (no not today, sometime prior to today) and is awaiting approval.
Google+, a social Network from Google, which was announced on 29th June, is still in limited invite-only testing phase and is available to small number of people who are testing it and giving feedback to Google. Before Google make this accessible for everyone, they have decided to push its Google+ client to App Store as Google developer, Erica Joy, posted an update on her Google+ profile that they have submitted Google+ app to App Store and it is awaiting approval.
Its just a matter of day or two that this App will get approved by App Store. Keep an eye on the updates.