Greetings from Norway!
First of all I have to say that I am following the ClassicPress project with great interest. I am very worried about the direction WordPress.org is heading (not very business minded), and I think ClassicPress can be the future for us.
I am running a WordPress multisite on a (very well tuned) Microsoft Internet Information Server (IIS), supporting 2 500 company intranet users.
Does anyone have any experience with migration from WordPress to ClassicPress on IIS?