I have started up a project on sourceforge to host the np++ code. There are a couple of releases of the module along with the modified version of radvd that is needed. The mapping advertisement daemon is on there as well as the wireshark dissectors.

The project can be found here for anyone that is interested in looking at the code:

NP++ On Sourceforge

All of the code is now hosted on the sourceforge svn server so that is also browsable on there.