In new edition of PerformancePoint Services (embedded in MOSS 2010) has been made many improvements and added new important functions.
If you are familiar with previous version of PPS 2007 you can quickly update your knowledge by studying the latest post on PerformancePoint Services Blog Team.
Among new features worth noting deeper integration with MOSS structures (e.g. since now PPS objects are stored in SharePoint lists and libraries), improvements in enterprise scalability, improved support for other web browsers, new enhancement in user experience (e.g. Multiple Actual Values in Scorecards, Pie Charts, new cool Decomposition Tree in Silverlight technology, SSAS conditional formatting, filters reusable between dashboards) and many many more.
Under the following link you can find more detailed list and descriptions of new cool features in new PerformancePoint Services 2010: