"Enterprise 2.0: Twitter Up, Facebook, MySpace Down," W. David Gardner's piece in Information Week.
And Gardner's piece in the same pub, "Enterprise 2.0: Making Virtual Collaboration Work."
Patti Anklam, who participated on the Twitter panel, provides a great summary and writes about some unspoken-at-the-time thoughts, including the red flag of security, on AppGap, "Twitter in the Enterprise."
Bill Ives, also on AppGap, publishes his insights into and experiences using Twitter, which he also shared in the session, "Twitter as a Business Application."
And finally on AppGap (thanks, AppGappers for all this attention), Jenny Ambrozek's "Enterprise 2.0 2009:Twitter’s Influence Everywhere & A New Realism."