After reading a series of blogs (here and here) by Chris Missal from LosTechies.com on the Specification Pattern I am am really interested in finding more complete examples. Does anyone know where I could find a more fleshed out example or perhaps an open source project that uses this pattern?
Also take a look at the Dimecasts 'Learning the Specification pattern' for a walkthrough of an example.
Having learned the Specification pattern through the same blogs as you listed, I'm not yet convinced. It could just be that the examples are too simplistic so it seems more work that it's worth. A good, extensive example that shows come genuine benefit would be nice.