John Battelle has an interesting opinion about Twitter's next inflection point on his Searchblog at:
http://battellemedia.com/archives/004925.php

Here's the post:

Twitter's Continued Inflection: Time For Facebook Connect
May 21, 2009
By John Battelle

CNet's Caroline McCarthy offers a post-mortem on Web 2.0 Expo on her The Social blog at http://news.cnet.com/8301-13577_3-10212247-36.html?tag=mncol;title

Here's the story:

Web 2.0 Expo: Time to hit refresh?
by Caroline McCarthy

SAN FRANCISCO--Stepping off an otherwise quiet street and through the door of the downtown restaurant Roe on Thursday night was, at first, like a foray into a secret fantasy world where no market crash or economic recession had ever happened.