Advertising videos that give only a hint of what what is being advertised but go viral very quickly

Using unusual creativity, an advertising company is creating advertising videos that are designed to attract viewers in the social media arena.  Unlike traditional advertisements, these videos don't directly push or mention the product.  Instead, the videos utilize creative methods that solicits the engagement of an idea that then leads the viewer to the product.  Story here: http://www.nytimes.com/2011/03/17/business/media/17viral.html?_r=1&ref=media

 

Here is an example of one of the video ads: