The Beauty of Closures
Fairly soon I'm going to write a blog post comparing the different proposals under consideration for Java 7 when it comes to closures. I thought it would be worth writing some background material on it first though, so I've put an article on the C# in Depth site.
I'm not entirely comfortable that I've captured why they're important, but the article can mature over time like a good wine. The idea is to counter the Blub Paradox (which I hadn't come across before, but I agree with completely - it's part of the effect I believe Steve McConnell was fighting against when talking about programming in a language).