Guys, info from VWD Team Blog :
The IIS team has just shipped the Microsoft Application Request Routing 1.0 module for IIS7!!!
Application Request Routing (ARR) enables Web server administrators and hosting providers and to increase Web application reliability and scalability through rule-based routing and load balancing of HTTP server requests. With ARR, administrators can optimize resource utilization for application servers to reduce management costs for Web farms and shared hosting environments.
To learn more about the features in ARR, check out the ARR site.
To get started with ARR 1.0 – download it now using the Web Platform Installer (Web PI).
The IIS.NET site also has some great tutorial content on how to use ARR.
Full story, just check it out here