Just so I've got this clear..

If I develop an enterprise ipad application and track down the customers myself, it is possible to sell to them and take 100% of the revenue still?

I can do this by offering the app for free on the app store and requiring activation through my own external signup system. However, I must also offer the option to sign up using Apple's API and Apple taking 30%?

I just need to be on the phone to the customer when they download the app and ask them politely to not use the Apple method?