[boost] Dynamic pluggable factories?

Hi, is there anything in Boost which resembles the dynamic pluggable factories as described in the article "Industrial Strength Pluggable Factories" written by Timothy R. Culp and published in the October 1999 issue of C++ Report (available online http://www.javareport.com/joop/crarticle.asp?ID=1520)? If there is no such thing, has something like it been discussed? dismissed? I for one can see a real need for it! /br __________________________________ Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com