Cross Promotions across Media - Fox Sports / American Idol

Does anyone know of any particularly successful and enticing cross-promotions between online, digital destinations and other media?

I am a huge fan, or have been this past season, of American Idol, so much so that they pushed me from my TV set to my computer to vote a couple of times. Definition of a successful cross-promotion.

I used to work for Fox Sports en Español and there were constantly links on the FSE website to and from the parent company site MSNBC.com, or suggestions on the website for articles in the FSE magazine, or for specials on the FSE TV station. The conversion rates were not high, though.

I love campaigns that successfully drive me from my computer to the radio, or vice versa, to TV, to Mobile, back to Computer.

Does anyone have any examples of these out of curiosity?