Google Changes SERPs Display for Forums

It looks like Google has just started adding additional information to results from forums in the SERPs. Notice right under the title below where it says:
5 posts - 3 authors - Last post: Aug 21

I've seen it for forums build with different forum software including vBulletin and SMF, though not PHPbb or punBB.

You can see it in Google's SERPs here.

EDIT: someone on Sphinn pointed out that Graywolf mentioned this already on his blog.