Well here it is. This is a very sketchy "brain dump" of the general form of demultiplexor I have been referring to. I think that it might be a basis for something eventually acceptable as a general demultiplexor for Boost. The general concept comes from a demultiplexor library that I have implemented privately (perhaps it could now be considered a prototype). I've tried to introduce the library design from a standpoint of rationale. This description is quite vague, but hopefully it will be a sufficient starting point. As always, comments of all kinds are appreciated. Aaron's Informal Proposal for a Universal Demultiplexor for Boost <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Multiplexing/AaronsMultiplexingIdeas> Aaron W. LaFramboise