Most organizations, when they initially start looking at SharePoint, are confused about what SharePoint is. They struggle to understand the features and what they need to solve their business problems. It doesn’t take long for the conversation to turn to a discussion of whether the organization needs to take on the additional cost of Microsoft Office SharePoint Portal Server (SPS), or whether the Windows SharePoint Services (WSS) already bundled with their operating system licenses is be sufficient. Most of the time, the decision isn’t very black and white. This article discusses the questions you should be asking before you make a decision.
http://mssharepoint.advisorguide.com/doc/17866 [Article removed]