Aaron Skonnard also has a list going on MSDN of new features for WCF in .Net 4. Our lists are going to look a bit different because I’m covering more, smaller features and Aaron’s list is targeted at beta 1. Some of the topics in the MSDN list though are:

• Simplified configuration
• Standard endpoints
• IIS hosting without an SVC file
• Discovery
• Routing service (previously included with Dublin)
• REST caching and help page
• Workflow services
• Non-destructive queue receive
• Simple byte stream encoding
• ETW tracing