So, at the GNET2 last week, I found out that you can now call Delegate.Invoke instead of using the C# functor syntax.  This makes code much more readable IMO --

delegate void MyCallback(string msg);
...
MyCallback callback;
...
callback += delegate(string msg) { Console.WriteLine(msg); };
...
callback.Invoke("Hello");   // instead of callback("Hello");

Very nice.