How can I setup automatic downloads at a preset time?

One of the smartest economists that I know in the world has an idea for an application. Is any of this currently possible? If not how could it be built without having to jaiilbreak the apple device?

"Each morning at a preset time, it awakens the iPad. It updates a variety of my apps in the warm bosom of my WiFi, including:

-Email
-Instapaper
-Twitter
-Dropbox
-iBooks
-Google Voice

Plus my media consumption of:

-WSJ
-NYT
-FT.com
-Barrons
-TBP Mobile
-Slate
-Economist
-Any Podcasts I subscribe to

"