Hello fellow Haskellers, (after failing (again) to send to the haskell list, I'm posting this here. I've contacted the mailing list owner about this.) I'm announcing the 0.4.0 release of the 'contstuff' monad transformer library, an alternative to libraries like 'mtl', 'transformers' and 'monadLib': http://hackage.haskell.org/package/contstuff The difference is that contstuff makes heavy use of continuation passing style both to increase performance and to make certain control flow patterns more accessible, including abortion, accumulation of multiple results, etc. On the wiki there is a quickstart introduction to those of you, who are familiar with monad transformers in general: http://haskell.org/haskellwiki/Contstuff Feedback, positive as well as negative, is highly appreciated. Thank you. Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/