Adds more fuel to the fire that traditional low quality link building is now pointless. As always and without the usual cliches, but concentrate on the content and let it all happen naturally. These kind of links may not pass PageRank, but they confirm Googles use and importance of "citations" or references back to your site/content.
Google: Unlinked URLs Are A Source For Indexing New Content
I think citation building is the replacement for link building
