I've played around with it, and it looks good. .NET does struts. If/when I lead another greenfield commercial team that's probably what I'd use. I really like what they've done.

But I decided to go html/jsonp/F#/SQL-server this time. It lets me completely separate my layout from my business layer, and with a few bits of auto-code-gen my data access layer is always up-to-date. So it really just leaves me a few hundred lines of F# code to write a full-fledged application. I'm also looking to move to mono and perhaps MySQL, and this architecture is probably the most amenable to that move further down the road. Plus by writing functional code in F# with immutable data structures my code is automatically parallelizable and ready for moving up to super performance using things like MPI if I want :)