The MahTweets team have released version 2.7 of the open source social media client.
Based on WPF, MEF and other developer goodness: with source code available if you want to see how to create a desktop application.
Many useability enhancements based on user feedback – and the needs of the developer team. All heavy twitterers :-)
Added this version is Plurk, Yammer and Identi.ca support.
Major kudos to Paul Jenkins, the Overlord of MahTweets. And thanks for letting the work experience kid (that is: me) contribute to the application.
Go get it, and tell the team what you think!