Sean used to maintain it, but he is not very active anymore, and has since deleted the thread, as it was very outdated.
I think a better solution would be thus:
Have a thread where you can say which Hamachi networks you are in, and collect all of the info for everyone interested, so that when Bobby wants to play Timmy, Bobby can look up which networks Timmy is on, and join an open one.
I can start the thread later; for now I have to go to a test.