The issue I have with this is that enterprise features are fairly well defined. It's not rocket science. In fact, many of these features already exist in their Mac OS applications (mail, ical, etc...) and just need to be implemented in the iPhone. Whereas, features that appeal to consumers are hardly defined and always in flux. It seems like Apple has a real advantage over RIM in this arena. So all they need to do is implement common enterprise features. I'd love to be able to flag my messages and have multiple signatures based on which account I'm using in my iPhone.