http://www.research.microsoft.com/research/dtg/horvitz/horvitz.htm
Microsoft agent projects:
1. MSR SiteSensor - collaborative filtering agents as Web companions
2. Merchant Server - agents suggest things you might want to buy
3. Lumiere - "office assistant" agents that adapt themselves to
a person's usage characteristics
4. Microsoft Belief Network - 30 Bayesian troubleshooters that
can be incorporated into agents in Microsoft projects
http://www.microsoft.com/support/tshooters.htm
That's all the agent efforts I know of, at Microsoft.
-- Adam