While you are one of the rare twitter enthusiasts that can actually give examples of how twitter has been useful (most say it is useful, but can never think of an example), I think you are leaving out the endless hours you spent sorting through all the garbage to find something worth talking about. . What the creators of Twitter are trying to resolve is a problem that is inherent to the service, it is a huge time investment for very little return. The issue isn't learning how to use the service; the twitter clients already hide this from the user. The effort required to sift through all the garbage, misinformation and useless rhetoric does not pay off in the end for the majority of users.
Also, I have yet to see anything on Twitter that cannot be obtained from other sources. As a matter of fact, the move away from IRC to Twitter to cover live events has resulted in an extremely poor experience and reduced functionality.
The IPO is the worst thing that could have happened to Twitter. Now they have to find a way to monetize the service to keep their shareholders happy, and like those who invested in Facebook, Twitter's shareholders are in for a huge disappointment.
The universe does not have laws -- it has habits, and habits can be broken.