What is PubSubHubbub ?
For those who host directly their own weblogs with WordPress, you already have the PubSubHubbub WordPress Plugin available to download.
A strange name but what does this open protocol do exactly ?
-PubSubHubbub gives the ability to make RSS and Atom Feeds visibles faster. RSS Readers that use PubSubHubbub (like Google Reader) update the content subscriptions in REAL TIME (« Push »)
-Google is using RSS Feeds and PubSubHubbub since november 2009 to index blogs faster
Please note that Typepad and Blogger already use PubSubHubbub.
Here is a video showing how this open protocol works :