Quick Link Post - today Workflow PM Leon Welicki has an article in MSDN Magazine called “What's New in Windows Workflow Foundation 4.5”. Here is the link:

http://msdn.microsoft.com/en-us/magazine/hh781025.aspx 

This article discusses some enhancements found in the .Net 4.5 Developer Preview. It’s not all new information, some of these enhancements you will probably also have seen mentioned previously in the similarly titled MSDN docs for “What’s new in .Net Framework 4.5” and “What’s new in Windows Workflow Foundation in .Net 4.5” and Ron Jacob’s //build/ talk last year.