The recent announcement by Yahoo on its blog is Sideline,a desktop application thatdisplays real-time mentions of specific keywords, brands, or names. It can search groups, advanced queries, and refreshes the application . It does it by pulling keyword mentions from Twitter.
It is a open source platform so there is lots of hope for develepors around the world
Sideline is an Adobe Air desktop application built with the Yahoo! User Interface Library
(YUI). It allows users to create and group custom queries by topics of interest.
You can download Sideline by clicking on the link http://sideline.yahoo.com/updater/sideline.zip