dynamic, Why not? - Context is King

In these days, people begin to expertise some new features in .NET 4.0. And I am same to them as well. One of features I like and write to this post is dynamic keyword. It is not new, at least in PHP, Python, Ruby... But in .NET world, I think it is new and ship to .NET 4.0 as a default. And some of projects are ported to .NET based on DLR as IronPython, IronRuby. We can use dynamic keyword in anywhere in our project. How do you think about it? So dynamite, isn’t it? :D. Some of people are didn’t like it...