I stumbled into a useful function that the Hamnet/HSMM folks have:
http://hsmm-mesh.org/hsmm-mesh-forums/view-postlist/forum-1-general/topic-58...
Maybe there is a way to do (code) something similar for the more traditional nodes on the amprnet.
Advertising what is out there on a network seems to be a major issue at least in my eyes.