I have a web app and I want to take photos and then upload them to a server. Can this be done with a webapp?
You'll be able to create 'provisioning profiles' for up to 100 different devices to directly install your apps on, without going through the App Store. The install process isn't as straightforward as calling up a URL or downloading something from the App Store, but at least you can limit distribution to specific people without revealing the existence of the app in the public App Store.
Also see iPhone App Minus App Store?