MS宣布推出ASP.NET MVC Framework：http://www.cnblogs.com/Dah/archive/2007/10/08/916958.html  

看了看上面的特性，概念几乎是全抄Castle的，见惯不怪了，nant / msbuild, nunit / mstest…… 无论如何，这对开发人员来说会是好事，ms必然能创造出更好的开发环境。

ASP.NET MVC还会使用aspx，但是它没有viewstate，没有postback，所以它在这里只是个模板引擎，并不那么邪恶。而且ms还开放了接口，能让Castle这样的第三方产品结合进来。Castle Team也表态，MS的MVC推出后，Castle部分的项目将会与其整合：

To The .Net Community,

You are probably wondering how the recently announced Microsoft MVC project will compete with Castle's MonoRail.

We think that any attempt to offer more productive tools, better testability and better separation of concerns is valuable, no matter who is the author. We are certainly pleased to see that Microsoft is delivering something that allows a more agile and productive type of web software development.

We also believe that MonoRail has been providing the same thing for the past two and half years, and will continue to do so. We're grateful that MS has chosen to offer integration points for Monorail and the Castle stack and as soon as it's available we will be working to integrate it with the rest of our projects.

Is MS' MVC better? Worse? Only once we have used both will we be able to tell.