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On the mobile front, there's a web app for iPhone users, pictured above, with access to your Stream, Photos and notifications about new Google+ activity. There's a fully fledged iPhone app in the pipeline, "coming soon" according to Google.
Android users don't need to wait of course. The Android app is already on Android Marketplace, offering those Google+ users who have scored a +1 to the closed beta the ability to perform location check-ins, view posts from other Google+ users in their vicinity and Huddle - a real-time group IM feature for mobile users resembling RIM's BlackBerry Messager.
Image: Google/Natasha Lomas/silicon.com