With the next Sharepoint product (2010) we have a lot more choices of product, these are available for diferent prices and targets.
SharePoint Foundation 2010
SharePoint Server 2010
FAST Search Server 2010 for SharePoint
SharePoint Server 2010 for Internet Sites, Standard Edition
SharePoint Server 2010 for Internet Sites, Enterprise Edition
FAST Search Server 2010 for Internet Business
SharePoint Online (hosting in the Cloud)
SharePoint Online for Internet Sites (hosting in the Cloud)