The Google+ 1.0.8.3514 for iOS update released today provides a new photo interface and, more importantly, the ability to start a Google Hangout (multiperson video chat) from the Google+ Messenger module. Tapping the camera icon in a Messenger contact gets things going.

Although the Google+ app is not a universal one, it can run on an iPad. You can see it in the pixel doubled (2x) mode in the screenshot to the left.