PubSubHubbub and polling?

Via PubHubSunday - Tim Bray: On the other hand, Twitter clients which rely on polling seem to make their users happy. I see nothing in the spec about supporting polling, i.e. how a client might ask a hub for its version of a feed, but that seems to me like it might be a real useful function. I don’t think that adding polling to PubSubHubbub (PuSH) would be a good idea....

October 19, 2009