Interesting. It looks like Kinja is now thumbnailing links from other sites. I'm not sure how I feel or if it will remain. Right now, it appears to only work through Groupthink, so as a test and a demo, here are random posts from four different sites.
It should also be noted that when this post is viewed in the Groupthink timeline, two of the thumbnailed links are on the index page as if they're from Gawker, while they aren't showing that way on my Crosstalk share.