Where do log entry links lead?

When a log is presented as an RSS feed, by definition the feed is a summary, and therefore each entry should be a summary of the activity and/or error. Therefore, the item's link should point to the full log entry. In the case of an activity log entry, the link's target will be a full description of the activity and include all metadata available. For an error log you will have access to the exception stack trace and a link (mailto: or similar) that can be used to submit the details of the exception (plus comments) to the service provider.