Haskell is such a great language and it's a real shame that not many companies see it's advantages. There was recently a discussion on haskell-cafe[1] about it's lack of adoption in industries other than finance.
Haskell is perfectly suited for critical systems: I've seen job postings for C++ programmers for air traffic control systems which I think could really do with haskell's type safety.
In recent years however haskell performance and library availability has made it suitable for general high level programming like web development for example[2][3].