Yahoo! News: An Open-Source Solution For Content Management

"With Plone, a tremendous amount of functionality is available without having to resort to customization. If you're looking for a generic portal solution with collaboration functionality, it's likely that you'll have to make very few changes."

The link address is: http://story.news.yahoo.com/news?tmpl=story&u=/cmp/20041223/tc_cmp/56200152