I just wanted to express my gratitude to whoever wrote the "IO inside" tutorial: http://www.haskell.org/haskellwiki/IO_inside It is one of the best pieces of writing in Haskell I've ever come across: not only is it clear and very intuitive, but it also manages to strike a perfect balance between "programmers" and "beginner haskell programmers". It certainly ties together a lot of other stuff one reads in books and category theory - and actually makes sense! My sincere gratitude, and keep up great job. I can only hope to write something as clear and useful as this. My only complaint is that it is really wasting away inside the Haskell Wiki - which gives it a rather bad "reputation", since a lot of wiki pages are of much lower quality. This should be nicely formatted in a PDF file or a even part of a book! Make it pretty and get people to notice it!!! Now i must sleep, -Andriy Drozdyuk