Chart outlining various aspect of Document Management: Wikipedia Chart
Document management planning process: Microsoft Technet
What can I do with Google Docs? http://docs.google.com/support/bin/answer.py?answer=49008&topic=8613
Chose the Edition that fits your needs (GoogleDocs) http://www.google.com/a/help/intl/en/admins/editions_spe.html
PowerPoint Presentation, "Georgia Tech's 2.0 Toolkit," http://www.r2consulting.org/ppnts/GTWikisEtc.ppt by Elizabeth Winter.
Wikipedia entry on Plone, an open-source content management system. http://en.wikipedia.org/wiki/Plone_(content_management_system)
UMBC Wiki: Confluence - "Confluence is the enterprise wiki designed to make it easy for you and your team to share information with each other, and with the world." http://spaces.umbc.edu/ A Library Space is already set up (you will need to log in to view it), or you can check out some of the existing OIT spaces to see some of the possibilities.