It seems like you can't go a day anymore without something new being added to Google+. Today, the mobile app is seeing an update that brings some much-requested features, including the ability to manage Pages from mobile. The method is a little wonky. Unlike on the web version, you can't just hop over to a page you're managing. You have to manually log out then log back in, at which point you will be asked what profile or page you want to control. It's bothersome, but at least it works.
The new app also brings an updated widget that looks a bit nicer than the old one.