The only problem is that it might be too arrogant for us developers to tell clients what will or will not work. In pre-twitter days, if a client asked me to bui

The only problem is that it might be too arrogant for us developers to tell clients what will or will not work. In pre-twitter days, if a client asked me to build something like twitter, I would think he would fail. So it is like a blog but with 140 character restriction? I would also think wikipedia would not work. Why would anyone take time and effort to contribute useful information for free and how do you guarantee the integrity of the information. Of course, right now, it all makes sense. But it is very arrogant to think that you know what will succeed or fail.