Finally, after many weeks waiting (SCPT was remove form Microsoft Connect), you can now download the final release of the SharePoint Capacity Planning Tool (SCPT).
The SharePoint Capacity Planning Tool is a set of free models of Windows SharePoint Services 3.0 (WSS) and Microsoft Office SharePoint Server 2007 (MOSS). The two models use the analysis and simulation features of System Center Capacity Planner 2007 (SCCP) to help you explore suitable IT infrastructure options for your SharePoint deployment, based on the SharePoint usage requirements for your organization that you provide to the tool. It can give you a head start on planning your SharePoint topology by producing a first approximation of the topology your organization needs. Architects, systems integrators, and deployment engineers will find it to be a valuable starting point for further refinements of the topology.
You will need System Center Capacity Planner 2007 to use this tool. You might also be interested in the SharePoint Capacity Planning Tool Executive Overview
Download : microsoft.com/downloads