via Arpan:
Upgrading an MCMS 2002 Application to SharePoint Server 2007 is now live in the MSDN Library. Note It is now a two-part article to meet ODC & MSDN length restrictions for readability.
Title: Upgrading an MCMS 2002 Application to SharePoint Server 2007 (Part 1 of 2)
URL: http://msdn2.microsoft.com/en-us/library/bb466172.aspx
Title: Upgrading an MCMS 2002 Application to SharePoint Server 2007 (Part 2 of 2)
URL: http://msdn2.microsoft.com/en-us/library/bb466171.aspx