I have received a few questions on migration path, so figured I would net it out:

• Site Server 3.0 – This is a code re-write from ASP to ASP.NET. Pipeline components not shipped in Site Server should still work – though the order schemas have changed. The components shipped inside of Site Server are no longer shipped with CS2007.
• Commerce Server 2000 – Full data migration is supported. Site code is a re-write from ASP to ASP.NET. Any BizDesk customizations will be lost as that feature-set has been replaced.
• Commerce Server 2002 – Full data migration is supported. Site code is a re-write from ASP to ASP.NET. ASP.NET users will have to migrate to 2.0 and will have namespace and some Orders changes. BizDesk or FP1 UI customizations will have to be re-done. Predictor has been moved into SQL Server 2005 BI.
• MSIB – This is being replaced with SharePoint 2007 (replaces CMS) used in conjunction with CS2007. As posted before, do not look for guidance before SharePoint 2007 releases (e.g. – expect no pre-release support/guidance).