Watson, a "proactive" search utility that watches what you do and automatically provides related search results from the web, is now available as a plug-in for the MSN Desktop/Toolbar suite.
From the press release:
Watsons sidebar display is continuously updated with real-time information that is relevant to the work being done at any given moment. This gives users an instant snapshot of information thats pertinent to their work. The security and identity of each Watson and Windows Desktop Search user is never compromised, since Watson does not store or transmit any personal data.
I'll be taking a closer look at Watson and its capabilities in an upcoming SearchDay. Meanwhile, the free 30-day trial of Watson 2.0 and the Add-in is available to download at http://addins.msn.com.