I know this is an old post from page 1 of this thread but Cory, I still have the original copy of the addon that you are talking about and still use it with my XF install however it has to have vb 3.8 installed in a folder off XF and be somewhat twisted to look incorporated into XF by way of an iFrame and Guest permissions.
If you want a copy of it just PC me with an email address and I will send it to you.
It is a very small mod of just 1 php page so I, and along with others it seems, would be grateful if this could be ported to XF if anyone is interested or this mod can be made so users could either view members as it is now or click a button for "points of interests" that a user can add on a Google Map. In fact it would be great if you could have Members, Points of Interest 1, Points of Interest 2, Points of Interest 3 etc