The documentation for the singleton is finished. I didn't end up writing a tutorial for extending the library after all, because it turned out that I already described the policy interfaces clearly in my reference section and didn't have much to add to them. Instead, I made sure that the tutorial had lots of links to the most important reference pages. New in this release is the addition of the cleanup class and the zombie singleton walk through. In addition, I did a bunch of minor bug fixing, most of which I don't remember, and most of which wouldn't affect most client code. I think one of the things I fixed was making sure that the malloc_creator frees the memory if construction throws. Anyhow, the new package is in the sandbox, enjoy! -Jason