Here is a quote from a good article by renowned useability expert Jakob Nielsen (www.useit.com) on using Content Management Systems in an Intranet context.

Content Management
"One of the key ways to make it easier for average employees to contribute to the intranet is to use a good content management system (CMS). Instead of having everybody design their own web pages, a CMS handles the mechanics of posting and lets people focus on their content and message." Full article is here