Hi, the second version of intrusive containers is available. Excerpt from the introduction: ---snip--- Welcome to Boost.Intrusive, a library presenting some intrusive containers to the world of C++. While intrusive containers were and are widely used in C, they became more and more forgotten in the C++-world due to the presence of the standard containers, which don't support intrusive techniques. Boost.Intrusive not only reintroduces this technique to C++, but also encapsulates the implementation in STL-like interfaces. Hence anyone familiar with standard containers can use intrusive containers with ease. ---snap--- You find the file intrusive.zip either in the yahoo file section or here: http://people.freenet.de/turtle++/intrusive.zip I consider this version being rather complete now and quite ready for a formal review (barring islist maybe). Best regards Olaf Krzikalla