Hi, everyone. I'm pleased to announce the release of a new iteratee implementation, iterIO: http://hackage.haskell.org/package/iterIO IterIO is an attempt to make iteratees easier to use through an interface based on pipeline stages reminiscent of Unix command pipelines. Particularly if you've looked at iteratees before and been intimidated, please have a look at iterIO to see if it makes them more accessible. Some aspects of iterIO that should simplify learning and using iteratees are: * Every aspect of the library is thoroughly document in haddock including numerous examples of use. * Enumerators are easy to build out of iteratees. * There is no difference between enumerators and "enumeratees" (i.e., inner pipeline stages). The former is just a type-restricted version of the latter. * Parsing combinators provide detailed error reporting and support LL(*) rather than LL(1) parsing, leading to fewer non-intuitive parsing failures. A couple of tricks avoid consuming excessive memory for backtracking. * Super-fast LL(1) parsing is also available through seamless integration with attoparsec. * A universal exception mechanism works across invocations of mtl monad transformers, thereby unifying error handling. * All pipe operators have uniform semantics, eliminating corner cases. In particular, if the writing end of a pipe fails, the reading end always gets EOF, allowing it to clean up resources. * One can catch exceptions thrown by any contiguous subset of stages in a pipeline. Moreover, enumerator exception handlers can resume downstream stages that haven't failed. * The package is full of useful iteratees and enumerators, including basic file and socket processing, parsec-like combinators, string search, zlib/gzip compression, SSL, HTTP, and "loopback" enumerator/iteratee pairs for testing a protocol implementation against itself. Please enjoy. I'd love to hear feedback. David