I just found this out from Chris Sells and Savas.
Add the address encarta@conversagent.com as a contact in Microsoft Instant Messenger and then chat away.
Some of my favourites are things like the equation editor as well as natural language conversions.
Peter says:
2*pi*7=?
Encarta® Instant Answers says:
Calculator
2*pi *7 = 43.982297
Peter says:
convert 150 lb to kg
Encarta® Instant Answers says:
150 pounds are 68.038855 kilograms.
(150 lb = 68.038855 kg)
Peter says:
Where are my keys?
Encarta® Instant Answers says:
Let me take you to a map of my keys. =>
Apparently my keys are in Florida and my wallet is in the Yukon Territory. That's strange...