Now You Really "Like" This Banner

Continuing the topic of bookmarkable advertising: not sure how Mountain Dew integrating Facebook "Like" buttons into their display ads is "the first time the social-networking behemoth will extend its social/sharing functionality to ads appearing on other Web sites," in Adweek's exclusive words. You can roll your own Likeable and Shareable banners with Spongecell; in-banner sharing functionality via third-party services has been offered for a fairly long time now.