Using Haskell for a web-project is mindbogglingly insane in my opinion. Not sure how that happened. Haskell maybe powerful, but it's learning curve is monumental for what it's being used for.
I don't mean this as an appeal to authority or ad hominem argument, by the way. There's no substance in your comment, so I'm more trying to understand the process of coming to your conclusion there.
As someone who has only studied HTML, CSS, and Haskell, I have no perspective myself about the learning curve issues in this case. But I have yet to hear strong critique of Haskell (even for web) from anyone who is a Haskeller. Seems everyone who uses Haskell thinks it's great — which cannot be said for common web languages like PHP or JavaScript. Again, I don't have a real perspective myself, so I dunno…