Microsoft has released Microsoft Web Farm Framework Version 2.2 for IIS7
This release addresses a couple of problems in Web Farm Framework Version 2.1. 1) WFF keeps installing ASP.net MVC3 on the secondary machines when MVC3 apps are deployed 2) WFF farm keeps restarting w3svc on Windows 2008 R2 in order to install Powershell MSU. More details information about this hotfix is in the Microsoft Knowledge Base article, KB2627276.Microsoft Web Farm Framework Version 2.2 for IIS7 (KB 2627276)