Web Server

I got into a discussion with folks in my local circle of computer heads. I was talking about what I liked about Haskell. Most of the local circle are sold on the idea that Perl is the best language ever written. They eventually challenged me: show us a web site that is being served by Haskell. Does anyone out there run a web site using Haskell? How much effort would be involved in creating a haskell_mod to plug into apache? Shawn