From the 2008 PDC the IIS team has released beta 2 of the Web Deployment tool. This is a wonderful tool to use. If you have an existing IIS 6.0 Server that you need to migrate to IIS 7, this is a great product to try.
http://blogs.iis.net/msdeploy/archive/2008/10/29/the-web-deployment-tool-beta-2-is-now-available.aspx
One of the great features is the ability to sync between server farms. I will be writing more about my experiences later in the week