I have the tendency to come off as a real idiot sometimes; and I tend to evangelize anything that looks remotely cool; and that's true, but BGGA closures, looks interesting to me. However, after I watched Josh Bloch's The Closures Controversy[slides] a few weeks ago, I got very turned off. The latest prototype looks a little bit better. I'll fiddle with it and post the code I wrote up here. Once again, I've yet to play with it, but perhaps it's better? All I know is that the groovy-like syntax for the closure operator piques my interest.