Hi, I guess most of you have already watched this laughing contest: http://download.microsoft.com/download/c/d/2/cd213f37-2a1d-4b79-80a6-fc82978... s_Language_MSRCam2007.wmv It offers first hand information that the usefulness of Haskell as programming language amounts exactly to 0. This is a big surprise for me. On the contrary, I think Haskell has been getting too expressive at the expense of fundamental issues left neglected like relatively weak module system. But here up comes another surprise - this complex fancy but pragmatic sugar developed to support human reasoning was selected to manage alien low level environment. Yet another shock comes form worshiping C, C#, Java as perpetually useful. So, it seems Okasaki wrote for an alternative world. This is becoming incomprehensible for me and I shall retreat to mathematics. But perhaps my impressions could stir up some useful discussion here, as I have great sympathy for you guys:-) Best regards, -Andrzej