MG Siegler’s first look at the iPhone app for Google+:
If you simply point your iOS Safari browser to plus.google.com, you’ll find a solid web app written in HTML5. You can’t do quite everything you’ll be able to with the native app, such as Huddle (group chat). But it the main parts of the Google+ functionality are there. Stream, Photos, Circles, Profile, and Notifications appear in the main menu.
And there are actually some other unique features, such as the ability to check-in to a venue and see Google+ message from users nearby to your current location.