Thanks for confirming, polymer. It was strange to read that section of Winer's article. Just so people know: if you're viewing a post, I believe you can click on the timestamp to the right of the person's name, e.g. "Yesterday 9:45 PM (edited 3:02 AM)" to get a permalink to the post.

Or if you see the post in your stream, I think you can also click the dropdown arrow at the top-right of the post and select "Link to this post."