There are two editions of DocuShare available now, the Core edition which provides full document management capability with a well-rounded set of collaboration tools built in such as discussion threads, blogs, wikis, subscriptions and notifications, and document routing.  The CPX edition adds process controls for automating routine functions as well as providing auditing tools and full workflow capabilities as found in enterprise solutions.  Includes 1 year Annual Support & Maintenance.  You can get more information on both editions at our DocuShare 6 site and view the product at the same time:
http://www.avidoffice.com/docushare/dsweb/View/Collection-713
Buyer’s Lab has awarded DocuShare with the Outstanding Enterprise Content Management Solution in the document management category as part of their Spring 2008 picks. 
http://www.buyerslab.com/news/viewarticle.asp?article=42836
We'll be glad to discuss and demonstrate these products for you and provide pricing so you can make a more informed decision.