Very nice. It looks a lot like the iteratee replacement I've been working on for an as-of-yet unreleased project of mine. The main differences: - my chunks only have a single ByteString, not a list of them (I was experimenting with a list at a point where I thought it'd be useful to be able to insert stuff into the stream, but abandoned it for the moment) - my enumHandle uses hGetNonBlocking to make it easier to deal with early termination when reading data off the network - I have a set of unit tests that cover the implementation fairly well My reasons for writing my own was basically the same as yours. I'll definitely have a look at ditching my implementation as some point, in favour of yours :-) /M -- Magnus Therning (OpenPGP: 0xAB4DFBA4) magnus＠therning．org Jabber: magnus＠therning．org http://therning.org/magnus identi.ca|twitter: magthe