Fairly soon after upgrading to WordPress 2.0, I started work on a small plugin that would do something I’ve been wanting for some time: inserting a notice into feeds for posts that refer to changes in the site. After about half-an-hour or so of tweaking it, I’ve got it into a representable state, and since it’s fairly general, you can check it yourself:
To install, stick the contents of the above link - it’s syntax highlighted - in /wp-content/plugins/, enable it in the Plugins area in the admin panel, and you’re good to go. To actually mark a post as needing display of the notice, add a “custom field” with the key sitespec and the value YES.
For completeness, the notice reads like this: “(Note: This post is about, or refers to, other parts of the actual WEBLOG-NAME web site. It’s recommended that you read the post in context on the site.)” where the second sentence contains a link to the post directly.