WSS 3.0 Demo
For you who haven't know what Windows Sharepoint Services (WSS) is all about and the newest features of WSS 3.0, you have to see this demo at: http://www.microsoft.com/sharepoint/demo.mspx
FYI, most of demonstrated features are available for free, except Office Sharepoint Server 2007 and Office Sharepoint Designer 2007, as long as you have Windows Server 2003/2008 & SQL Server 2000/2005 (those are should be bought). As this site says, WSS 3.0 is available as a separate download that is available to customers at no additional charge.
I'm not trying to sell something here, Microsoft doesn't pay me to do that :) I just wanna share with you about WSS 3.0 from developer & entrepreneur perspective. From developer perspective, WSS 3.0 is a comprehensive web application platform that can be extensively customized to develop LOB web application. From entrepreneur perspective, you can sell the solutions based on WSS, such as deployment, customization. etc. Not like Community Server (sorry CS lover, actually I'm also CS lover :P) that its license should be bought by the end user (beside the Windows Server), there is no money to spend to implement WSS within end user's environment. The only things should be bought are Windows Server 2003/2008 and SQL Server 2000/2005 (correct me if I'm wrong :P), while SQL Server 2005 can be replaced by SQL Server Express 2005 (I haven't try to use SQL Server Express, but I will & let you know how it will come).
That's it. Have a great day.