Prompted by Terris' comments below, I found sometime this evening to start getting the release ready. All the XPath development code is now in the main cvs module, src. The xpath-dev-sandbox module is now dead and I'll no longer be using.
Right now there are solution and project files for VC++ 2003. I need to whip up VC6 project files and some makefiles, and I'll be good to go.
Something I don't think I've explicitly mentioned before - this initial release of the XPath engine only supports DOM::Node<std::string>. I'll loosen this to support DOM::Node<whatever> in due course.