I've just added two new features to the Silt server:

• Per category RSS feeds
• Potential per-item RSS feeds

The former are self explanatory - each category now has an associated feed - the XML links are in the sidebar. The per item feeds need a bit more explanation. As an anti-spam move, I started closing down comments to items that had aged out of the RSS feed - I figured they were effectively invisible (to me) once they left the feed, and I wouldn't see any spam that came in. I recently added a feature that allows bloggers to mark comments open for individual posts. So, any such post now has an associated per-item feed (there will be a feed link right on the page for such items).