pubsubhubbub and rssCloud are helping shed light on the technical solution to real-time event propagation; HTTP POST (aka webhooks). As a friendly reminder, if you’re building pubsubhubbub and/or rssCloud into your app as a publisher/author, you should also consider pushing to Gnip as well. While Gnip, pubsububbub and rssCloud are providing sound technical solutions to a huge problem, Gnip’s widespread adoption (thousands of existing subscribers) can get your events in front of a consumer-base that Gnip has spent over a year cultivating. With very little integration work on your part (heck, we have a half-dozen convenience libs already built for you to use; pick your language), you can get your data out to a wide-audience of existing Gnip subscribers.