1.	I anticipate complaints along these lines -- "This is just email."
2.	But it's not. First, everything on the Internet is just like something else. Or if it's any good it's just like everything else.
3.	If you try to push video and audio through email you'll find the client user interface as daunting as the wait-click Web experience. How do I keep enclosures from downloading while I'm accessing email from a phone connection in a hotel? Sure, you could add a complex dialog to an already overly-complex email client user interface, and the result would be that no one could set it up properly and no new video would actually get to the desktop. (You'd hate the feature until you figured out how to turn it off.)
4.	Further, when you view video in a client that wasn't designed for it, it can look techy and sterile. I believe that's why Adam and his team are doing such a gorgeous graphic environment for video.
5.	Another important point, there's no reason that RSS can't be delivered via email, in fact we plan to do that. But first we need a format that can carry the payload we want it to carry. In the end it may all run over email, but first we have to step outside its limits and create a variety of different environments and see what people like and what works.
6.	Dave Winer