MSDN Webcast: Using the BizTalk Business Rules Engine: Tips, Tricks and Best Practices (Level 200)  

Define and change business rules without recompiling or restarting your application.  The Microsoft BizTalk Server 2004 Business Rules Engine (BRE) provides a new framework enabling the implementation, deployment, and versioning of your solution's business logic in an agile and extensible manner. This webcast focuses on the most effective ways to incorporate BRE in your BizTalk solutions. You will learn tips, tricks, and best practices for developing, testing, deploying and maintaining BRE rules and policies.