A while back, Google announced support for a few new meta tags related to article attribution.

Joost de Valk, creator of some fantastic WP SEO plugins, wrote 2 helpful blog posts about their implications and applications. To see screenshots and learn how to implement authorship markup on your sites, please see:

Highlighting Authors in Search ...and ...
rel="author" and rel="me" in WordPress

Added: August 26

And here's another quick overview of how to implement these tags and what they look like in the SERPs.