Extend this module with SUP, PubSub, Rsscloud

Issue Summary

First I explain why I like to collaborate with the your FeedAPI module.

At the moment there is no fast distribution of the rss feeds. All the feeds published by drupal pings the crawlers via ping-o-matic (ping.module) or another subscribers (multiping.module).
One of the limitation is that it could take a while when the subscriber pulls you're RSS feed.
Another limitations is that it is difficult to get updates from services quickly without the crawlers overloading your site servers with update checks.

There are different solutions to distribute your rss feeds faster without it polling problem:

* Simple Update Protocol, that was proposed by Paul Buchheit from Friendfeed. (see http://code.google.com/p/simpleupdateprotocol/)
* PubSub Protocol, that was proposed by Brad Fitzpatrick and Brett Slatkin from Google. (see http://code.google.com/p/pubsubhubbub/)
* rsscloud(see http://rsscloud.org/)

In the future it will be common to use these publish methods. Wordpress has a plugin that support pubsubhubbub. I do not think we would lose by Wordpress.
There is also much demand by the community:

* http://code.google.com/p/pubsubhubbub/wiki/PublisherClients
* http://drupal.org/node/551980

So now i like to approach these features via my fastwebfeed.module.

Can you please contact me,
thx,

Jo Bollen