google is introducing pubsubhubbub.
it’s an open protocol for training atom and rss feeds into realtime streams. or, in nontech terms, it’s a subscription model that allows two completely different websites to communicate in realtime through a hub. in even simpler terms, it’s a cross-platform subscription service. for example, if you blog on wordpress, you can publish your content to your wordpress blog and to subscribers on other systems instantly, in realtime.