Would be nice to see if this could be converted to javascript to run in the browser, just like markdown. I don't know Haskell myself, but there are javascript ports of the Parsec parser library here: https://github.com/weaver/ReParse http://code.google.com/p/jshaskell/

As well as several Haskell to JavaScript compilers here (Fay, ghcjs, & jshaskell seem to be more popular): https://github.com/jashkenas/coffee-script/wiki/List-of-lang...