I have a lot of respect for Dave Winer and have been following his thoughts on the future of Twitter.  I hope people listen to what he has to say.

“Here’s a screen shot to contemplate.  There are two 140-character messages. Each illustrates features of the new shipwreck I hope to sink, to create a new coral reef for Twitter-like systems to grow on and around.” – Dave Winer via scripting.com