Hey, I think it would be an interesting info to get from the demo hub as well, but we (superfeedr) published a list of the services for which we have callbacks : http://blog.superfeedr.com/Feeds/PubSubHubbub/real-time/stats/who-pubsubhubbub/
Brad, Brett, what about making this same list public? Ju -- Julien Genestoux, http://twitter.com/julien51 http://superfeedr.com +1 (415) 830 6574 +33 (0)9 70 44 76 29
