Looks interesting (especially like the @foreach syntax), but I don't see much advantage over PHP unless your deployment is limited to a Windows-only environment. I forgot that the IIS Web.Config was so similar to Tomcat.
Then you get access to nicer frameworks like Lift, Play, et al with the associated free and open source infrastructure.
I'm talking about production environments. I do myself use WinXP for development, because I'm forced by other tools I must use; but my current production env is Ubuntu.