I did a little experiment this morning, disabling plug-ins in my browser aka "the iPad experience". See where things start to break down? The Apple iPad web browsing experience, not quite what you expect. Yes, there are native apps for a number of these sites (social gaming on Facebook anyone?) I'm specifically talking about the web browsing which Steve yesterday called "the best web experience you’ve ever had".
The message here seems to be, if you have an interesting site that we don't support create an app for it.