PuSH Syndication for Atom/RSS Feed with PubSubHubBub

Hi everyone, I have a project that I am working on that requires me to import an Atom/RSS feed into the wordpress installation. However this Atom/RSS feed is coming from another site that uses Google’s PubSubHubBub protocol (PuSH) and from what I understand normally RSS readers will ONLY pull from the feed when the Hub sends a PuSH request to the subscriber.

The client uses a service that allows them to write their news articles and they are all then sent through that hub to all their subscribers. The problem I have found is that all the RSS Syndication / Importing plugins seem only to do a timed pull from the feed and not respond to a PubSubHubBub request.

Does anyone know of any good and reliable plugin that can do a pull from the RSS feed when the PuSH notification is sent by the hub? Or maybe how could that be implemented in WP?

Thanks in advance guys.

Vitor