Jim Sinur of Gartner has a fairly recent post where he surveys the platform players and their recent acquisitions of rules technologies. Jim looks at each player and gives his opinions on their offerings, the technology they purchased, and what they will likely do with it.
There probably isn’t a lot new here to those folks who regularly follow this space. However, the paragraph about Microsoft may catch the attention of careful readers. (And I’m not talking about his incorrect statement that WF Rules is embedded in Visual Studio. It’s actually part of .NET. One of these is a framework, and the other is an IDE.)