With the release of IIS7 many people are working on how to migrate from IIS6 to IIS7.
The pre-release version of Microsoft Web Deployment Tool (http://learn.iis.net/page.aspx/346/microsoft-web-deployment-tool/) is a grreat tool to move sites and content.
I was able to move about 20 sites by using this tool and re-create them in IIS7. It was a very painless process.
If you are starting to migrate sites I would recommend giving this a try