Seconded. Reading the source code is a lot of fun. It's well organized and really makes the case for Arc's approach to HTML. I know I'm a convert; having stuff in so many separate files, MVC style, feels like sludge compared to this. Even if you do have to start breaking things into separate files as the app gets more complex, being able to start out like this is a serious gain.
This rocks. I've been waiting years (I'm not making that up -- years!) for a guy to re-write his running site in C#, SQL Server, and who knows what other heavyweight tools, and you cranked this out in a matter of days, and in a couple of pages of code. Granted, that other site has many more features, but still. A pretty good testimony to Arc, if you ask me.