I am currently in need of a simple iPhone app that a restaurant can use to update their menus, specials, locations, upcoming events.

The 5 main views would be:
-Events
-Menu
-News/Twitter Feed
-Deals
-About (inlcude locations with mapView)

Here is a sample of an app I would like to model:
http://itunes.apple.com/us/app/public-house/id384959099?mt=8

There needs to be a web CMS that the restaurant manager can login to and update the events page, menu page and deals page so that the app can be updated dynamically.

Also, on the app front end, there should be Facebook and Twitter connectivity to allow the app user to share events or deals within the app. The Facebook status should then update, "Bob is planning on attending karaoke night at the Burger Shack on Thursday Night!"

Thanks!