Microsoft released an an update of StreamInsight 1.0 that contains a number of important enhancements & fixes to the product. This update is released as part of SQL Server 2008 R2 CU2. A number of key enhancements including: Support for .NET 4.0 development, A new API called ClipEventDuration, and A number of performance enhancements.
More Info & Download: KB2120979
Also, Torsten TechEd North America 2010 session "Microsoft SQL Server 2008 R2 StreamInsight: Come See the Value of Real-Time Data Management" are now available (embedded below). And, you find the code for the Market Monitoring demo with Silverlight UI for the stock trend lines and SQL output of the session.
View: PPT Slides