I have been a Haskell fan since I first get introduced to the language, in the now deprecated course taught by Koen De Bosschere when I took my final year before graduating as a licentiate in computer science (which would now be a MsC. in CS). Due to a lack of time, mostly, I never proceeded very far beyond the basics, not even when I was a teaching assistant for this course. Still, with Mollom having been released, the Haskell application database Hackage finally coming into adulthood, or some form of it, I deemed the time ripe to attempt writing a wrapper for Mollom.
That said, first thing to do is check Hackage and find stuff we can reuse. haxr immediately comes to mind for the XMLRPC stuff. Other packages I am using are base64-string, crypto, configfile,
Installing the above will download and install a number of other libraries on which these depend. Still, Hackage seems to do the trick just fine, installing everything I needed.