New Bing feature: website thumbnails?

LiveSide reader Alber1690 came across an interesting find within Bing search results today (thanks for the tip!): a thumbnail view of the FAA site he was searching for (mouse over the right edge of the first result to see the pop up):

5504.bingfaa_thumb_488c017a Bing

While this seems to be a nice little addition, we’re not sure whether this is an update rolling out, or just a test. Alber1690 wasn’t able to find any other sites that exhibited this behavior, have you noticed it?