In my Haskell Implementors 2012 talk Haskell Platform: Field Report and Future Goals, I called for an expansion of the content of the platform to bring it up to par with what other programming language platforms provide.

Please see my blog post today: http://mtnviewmark.wordpress.com/2012/12/06/growing/)

Where I outline what is missing, and call for a ramp up in our efforts to grow the platform.