Did you know you can add the user encarta@conversagent.com to your M$ Messenger contacts list? And the thing that´s really k00l, you can ask lots of natural language questions like (text from its first output):

Welcome, Bruno Patini Furtado! My name is Encarta Instant Answers. I am a smart computer who can bring you the Encarta info you want right in your IM window!
Here are some questions you can ask me:

• I want to see the map of Mexico.
• When was Leonardo da Vinci born?
• How many calories are there in an orange?

I did the question "who was Tesla?" and it opened a embedded IE nicely integrated with the chat window.

Really cool :)

Oddly it could not know what Google is... not fair from M$