Hello, I have put up a new version of monadLib, which is available from hackage: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/monadLib-3.3.0 The changes in this version are fairly small: * added an identity transformer, which is useful as a placeholder in some applications, * removed the RunStateM class because it does not seem to add extra functionality, * added a family of deriving functions that can be used to implement many monadLib functions for user-defined monads (e.g., monads defined via a newtype declaration). As usual, comments, bug-reports, and feedback are most welcome! -Iavor