From Scott Guthrie’s blog:

Last month we released a beta of the Microsoft Web Farm Framework. The Microsoft Web Farm Framework is a free product we are shipping that enables you to easily provision and mange a farm of web servers.  It enables you to automate the installation and configuration of platform components across the server farm, and enables you to automatically synchronize and deploy ASP.NET applications across them.  It also supports integration with load balancers - and enables you to automate updates across your servers so that your site/application is never down or unavailable to customers (it can automatically pull servers one-at-a-time out of the load balancer rotation, update them, and then inject them back into rotation).

Downloads: X86 / X64

Features:

- One step provisioning of servers added to a farm
- Platform Provisioning using Web PI
- Application Provisioning using Web Deploy
- Policy-based Provisioning
- Installation of additional platform components and content
- Reduced down time with load balancing integration using ARR
- Up-to-date status and trace logs of server farm servers
- Extensible model that allows you to write additional providers

Resources:

- Microsoft Web Farm Framework web site

- Official post on Scott Guthrie’s blog (includes tutorial)