The ShareThis team has rolled out a trending content widget (blog post). Even better, you can create one that is customized for your site. Here is mine (feed readers, please click through):

I think the thumbnailing feature still needs some work, but overall it’s pretty slick.

If you haven’t already, you should also create an account and check out the analytics features in the publishers dashboard as well. I was very interested in some of the things I saw there. There is more sharing activity going on from my site than I realized. If you are a publisher, you might have a similar experience.