PubSubhubbub was built to work with Feeds, but works with any type of data (including JSON obviously). Feeds are a great first step, because it's a lingua-frenc

PubSubhubbub was built to work with Feeds, but works with any type of data (including JSON obviously). Feeds are a great first step, because it's a lingua-frenca! They are ubiquituous from Craisglist to Twitter, thru Flickr to CNN.com... etc Also PubSubHubbub is an open protocol, which means that anyone (including you!) can easily implementing it without locking themselves in a proprietary protocol.