Lurking deep within the code of the Monastery there is a keywords feature, only half-implemented. It's pretty much just awaiting further conceptulization, brainstorming, and coding. It's not really functional yet, and nobody seems to really have a good idea of what to do with it.

But when/if it ever gets completed, it will probably facilitate the type of thing you're suggesting (again, with additional code). The keyword feature allows people to assign keywords to nodes, and those keywords can (in theory) be used to search for nodes of like content. As I said, it's pretty rough right now, and there really isn't any search facility attached to it from what I can tell. But maybe someday it'll come to fruition.