As we bring up our new consortium website, I'd love to move away from the old HTML model and find a better collaborative tool that everyone can use, and requires minimal maintenance from me or another sys admin. Content Management Systems are surely the way to go.
Here's a site that allows you to try before you buy (a misnomer, of course; they're all free!):
Note: At Computers and Libraries 2004, there was a demo of Plone, which sits on top of Zope. Don't see it listed for some reason. The library in question was SUNY Stony Brook Health Science Library
Here's the link for Plone