Rich just discovered EVDB. EVDB is a site for posting information about events. I got early word about the site via The Well since one of the founders posted about it there. I created an event record for the ASAE Annual meeting in Nashville a while back.
One way this could be used is for people blogging about an event to ping the event record in EVDB to keep a central log of all the activity. Here is the trackback URL for the ASAE Annual meeting record on EVDB: http://api.evdb.com/trackback/E0-001-000179291-2