Windows Workflow Foundation

After the announcement last week of this great piece of technology, we can finally all start to talk about it. Although you can code directly against the WWF, it contains a nice example of a couple of graphical DSLs that allow the developer to declaratively describe workflows consisting of human and system activities. The lead architect for WWF, Dave Green, has started a blog here, but you'll also want to check out a great article written by David Chappell published on MSDN here.