A couple new or newly updated TechNet articles on Project Server 2007:
Plan for administrative and service accounts (Project Server) This article describes the accounts required for a Office Project Server 2007 deployment. It has been updated to specify that service accounts require permission to log on interactively on the computers running the service in question.
Deploy Project Server 2007 to a server farm environment This article describes how to deploy Microsoft Office Project Server 2007 in a farm environment. It has been updated to reflect the fact that SQL Server connections over named pipes are not required for Office Project Server 2007.