Looks like the Atom feed is already using
published and
updated elements to reflect modifications:
Code:
<entry>
<title>RESOLVED - Tokyo Connectivity Issues</title>
<link rel="alternate" type="text/html" href="http://status.linode.com/2012/05/tokyo-connectivity-issues.html" />
<link rel="replies" type="text/html" href="http://status.linode.com/2012/05/tokyo-connectivity-issues.html" thr:count="0" />
<id>tag:typepad.com,2003:post-6a0128765932c2970c01676610937c970b</id>
<published>2012-05-03T08:22:47-04:00</published>
<updated>2012-05-03T09:40:32-04:00</updated>
<summary>9:40am (EDT): The connectivity issue with our upstream provider has been resolved. 8:20am (EDT): We are aware of an issue affecting connectivity for Linodes in the Tokyo datacenter. We are investigating and will post an update with more information shortly. There is no reason to issue reboot jobs at this time.</summary>
...
The RSS2 feed only has
pubDate which doesn't appear to change once an article is modified.
Not sure which feed readers are capable of noticing when the
updated value has changed - I don't really use them.