Google released a brand-new Places manager app on the Play Store today, allowing owners of Google Places pages to control and update their Places listings from any Android device quickly and easily. You can adjust things like hours, contact information, add photos, and even post updates that will show up on your business listing's Google+ page.
You can manage as many businesses as are linked to your Google account, though some businesses may not yet be compatible with the new manager, as the app's description notes. Perhaps most importantly, you can view metrics for your businesses using the app, allowing you a quick and easy way to gauge the success of social campaigns or advertising. I know if I had a places listing, I'd be all over this app - it sure beats using a web interface.
It's on the Play Store now, though you can't actually do anything with it unless you have a places listing linked to one of your accounts. I know you're going to download it anyway. It's OK, I won't tell. Probably.