The new advertising allows members of Facebook to leave comments on participating ads, add the brands to their list of "fan pages," and use them to send friends virtual gifts. For the social network it's a small but important trial as it continues to combat the common wisdom that sites of its ilk can't survive on ad revenue.
But she also speaks about perils of such advertising programs, like the one faced very well by GM with it's Chevy Tahoe advertising program. But I think it is a very good read as we get ready for these interactive advertisements.
Here is Caroline's piece.