You can mow add to Encarta articles online. After a review by the M$ staff, your edit may be added to the Encarta.
That's so great about Microsoft - they alway invent new things! :-)
http://developers.slashdot.org/developers/05/04/08/1658247.shtml?tid=109&...
Hey I have a proposal ;-) All active users of all wikipedias take one day off the wiki and edit Encarta for a day. Let's see if they can handle that ;-)
Cheers,
Delphine PS. Don't forget to preview before sending your edition ;-). Or again, not.