This morning when doing my normal Googling I noticed two new icons associated with every search result. Here’s a screenshot (click for a larger image):
As you can see there is a new arrow icon (promote) and a cross icon (remove). The purpose of which is explained on Justin Hileman’s site. He went into extensive detail regarding his findings and the operation of the new feature here, here and here.
If you’re not seeing the icons on your Google results you’re either not logged into your Google account or your account currently isn’t selected for the closed test. And there doesn’t appear to be any selection criteria for the test as I haven’t (as far as I’m aware) changed any Google settings or my browser or location recently and the new icons just appeared.
I’ve never really got into the Social Bookmarking scene so it will be interesting to see what Google can make of this.