Control Outbound RSS plugin for wordpress

This plugin will handle several aspects of RSS feeds generated by wordpress

1. Reduce the amount of bandwidth required to transmit the RSS by sending only the items which were had not being already sent to the specific RSS reader.
2. Better control on the amount of items which are included in the feed. For sites with very frequent posts or comments the default of 10 might not be enough.
3. If it is possible at all, add a feed per a comment thread.

The first version handles only the bandwidth reduction issue. Just download it, put it into your wordpress plugin directory, if you use it for a stand alone wordpress, or at the mu-plugins directory for wordpressmu.

It was tested in wordpress 2.8, but it should work for wordpress 2.2 and above.