Google AdWords Testing "Products from this Advertiser" in Ads?

Just saw this on Search Engine Roundtable...

"A WebmasterWorld member said he saw Google trying out a special type of Google AdWords listing.

He said he was using the AdWords Preview Tool and did a search on something. He then saw that under an ad, which showcased a Google Checkout icon, was a link with a plus sign that read "Products from this Advertiser."

He said, that if you clicked on the link or the plus sign, the box would expand to showed 3 products, descriptions, and links to the merchant's site."