Perhaps everyone else knew about this and failed to tell me, or perhaps I knew and then forgot, but the New York Times is making permanently accessible permalinks available for their articles online.
This sounds obvious, but it isn’t. NYTimes.com charges for access to older articles, and up until this change (whenever it was), the only way to bookmark an article in such a way that you’d always be able to get through to it was via a hack.
But they’re getting hipper now, with buttons to directly bookmark to a few social-bookmarking sites (not del.icio.us, too bad for me), and also a “permalink” button. Clicking on that reveals the key to the kingdom, with the welcome announcement
To link to this article from your blog, copy and paste the url below into your blog or homepage. Using this link will ensure access to the article, even after it becomes part of the NYT archive.