IBM/Lotus Enterprise Microblogging Debuts: What about Microsoft?

Is IBM onto something here, ahead of Microsoft? Indeed, Lotus-based organizations should see benefit from the secure enterprise microblogging as described below. Seems organizations based on Exchange would similarly benefit, if the upcoming Exchange 2010 release would include these "publish/subscribe dialogues" within the enterprise, similar to Twitter (but no indication of that from the Exchange 2010 Beta so far). Exchange's unified messaging since Exchange 2007 may be useful and have significant benefits, but IMHO not as simple and easy to use as a Twitter-like service could/should be, if integrated intelligently into the enterprise architecture. Here's further information courtesy of IBM Enterprise Microblogging Debuts - Technology For Change:

"Lotus Connections now boasts a Twitter-like service that lets employees establish and maintain publish/subscribe dialogues within their organizations.

At its Center for Social Software symposium being held this week in Cambridge, Mass., IBM announced the release of a microblogging and file-sharing facility bolstering the Lotus Connections suite of enterprise social networking tools. The Twitter-like service enables employees to establish and maintain publish/subscribe dialogues within their organizations.
Additional features added to Lotus Connections include support for iPhone and Nokia S60 mobile devices, including microbrowser access to Profiles, Activities and the Lotus Connections blogging tool..."