Even APRS would be useful for folks that have 44net services to share. (Re-inventing bonjour/ZeroConf....) Perhaps this is a good reason to revive the HTPP convsers server (IRC clone) and use it for announcements like the DStar folks do with IRC technology.
I think there would be some slightly different approaches:
1. a written announcement like writing "I have this nice webserver" on convers and requiring people to read the discussion there. of course this information will get lost over time as other services are announced there.
2. a more static approach like putting all available services on a WiKi page that can be edited by everyone. (possibly in a hierarchic way with a page linking to other regional pages)
3. an automatic system like bonjour where every active service is regularly announcing itself on the network and some page is dynamically updated when services appear and disappear.
It certainly is something that is worthwhile to take up because it is a frequent question when having new users. "what can I find on the net and where"
Rob