Stigmergy and the World-Wide Web

I was impressed by Joe's Stigmergy and the World-Wide Web, which purports that this grande ole internet is the "first stigmeric communication medium for humans". Stigmergy, as defined by the originator:

Self-Organization in social insects often requires interactions among insects: such interactions can be direct or indirect. Direct interactions are the "obvious" interactions: antennation, trophallaxis (food or liquid exchange), mandibular contact, visual contact, chemical contact (the odor of nearby nestmates), etc. Indirect interactions are more subtle: two individuals interact indirectly when one of then modifies the environment and the other responds to the new environment at a later time. Such an interaction is an example of stigmergy.