Yes, that is exactly the purpose of LWN's subscriber links. It lets subscribers share content with non-subscribers in a "controlled" manner, which I guess means LWN can track usage and so on. I think it's awesome; thanks for sharing, rythie.
"Where is it appropriate to post a subscriber link?
Almost anywhere. Private mail, messages to project mailing lists, and weblog entries are all appropriate. As long as people do not use subscriber links as a way to defeat our attempts to gain subscribers, we are happy to see them shared."