So, the guys from Developer Express can't be far behind, actually today they also announced officially the support for ASP.NET MVC in a blog post by Mehul Harry (DevExpress Technical Evangelist).
The post also announces the inmediate availability of a FREE demo application with source code included called DevExpress Mail Demo.
The post states the following regarding the demo application:
The MVC Mail demo is an online mail application similar in basic features to gmail.com or mail.com. So have fun playing around with it. And don’t worry about breaking the database because there isn’t one. Instead, this demo uses session state to persist the tiny amount of data. This allows you to tweak and bend the demo without us having to reset some database.
Check out the sample here: http://mvc.devexpress.com
Stay tuned for more on DevExpress and ASP.NET MVC. They are catching up and comming very strong.