Friday MS, announced that they will include PerformancePoint Server 2007 in the MOSS 2007 Enterprise CAL, which means you can add these BI features within MOSS within the same license.
“As part of this vision, and feedback from a wide variety of customers, PerformancePoint scorecarding and dashboarding capabilities will now become part of SharePoint Enterprise CAL and available to customers who are on SharePoint SA. This means that customers who want to deploy PerformancePoint can do so today at no additional cost.
In mid 2009, we will release PerformancePoint Server 2007 “service pack 3” which will include updates to the current product’s planning module. Thereafter, customers should not expect further investment in standalone versions of PerformancePoint Server. However, we will continue to invest in a performance management platform and increased functionality through Excel, SharePoint and SQL Server to support broad-based performance management models and simulations. These changes enable customers to deploy a complete BI solution with existing investments in SharePoint Server, SQL Server, and Excel.”
Read more at the SharePoint Team Blog.