I really like the idea of a source and sink class, among other things it would allow things like a sink which spit out a cryptographic hash of everything that went through it discarding the data itself. or one which droped everything to an in-heap list. or even one that split the data into two and sent it to multiple sinks... such a framework would be very useful in real world programming. also, Haskell really really needs a standard 'Byte' type rather than confusing Char, but I have ranted about this before, I am glad to see other people think the same thing... :).. John -- --------------------------------------------------------------------------- John Meacham - California Institute of Technology, Alum. - john@repetae.net ---------------------------------------------------------------------------