Interesting observation by dave Winer.

In a way, as a user of Twitter, I have the same business model as the investors in Twitter. I don’t know what it is, but I have a feeling there’s something here. I look at it this way, if you tried to tell me what we’re doing on Twitter has nothing to do with what we’ll be doing with networks in the future, I’d be 100 percent sure you were wrong. There’s something here. The challenge is to figure out what it is.

However increasingly I’m sure that Twitter itself is not it.