After I select a location, I can choose which Circles to share my Google Places check-in with, add a comment to post with the check-in, and add a photo. There are two icons for photos--one to take a new photo, and another to add a photo that is already on the iPhone or iPad.

Clicking on the pencil icon to write a new post presents essentially the same input screen. There is a text box for typing a comment, a field for choosing which Circles to share the post with, a field that marks your location if you choose to, and the same two icons to take a picture or add one from your photo library.

Circles

Tapping Circles from the main Google+ screen brings you to the apps Circles interface. I can view the people in my Circles either alphabetically as a whole, or tap Circles at the top to view each of my Circles separately.

There is a Suggest People tab, and a search function so I can add new people to my Circles on the go. From within the Circles view, I can also add new Circles if I choose.