This language is very used, but there are still little places where I could ask questions and get useful answers. And I could really need one now.
There is a tag for Haskell on StackOverflow.
If that does not have enough users, I doubt a Haskell-specific Q&A site will help. It would only split the available answerers between the two sites.
So, I hope the Haskell section of StackOverlow will be useful to you.