Marketers, marketing students and those with an interest in marketing should read this AdAge article on widgets, "Widgets Are Made for Marketing, So Why Aren't More Advertisers Using Them?"

In a nutshell, the article compares the widget hype with realities
("virulence is hard to achieve") while looking at different ways to
approaching a widget (game widgets, which tend to get passed around,
versus duration widgets, which are not shared much) and technical
issues advertisers have to face.

LINK (via Coolfer)