Cool Pespi Ad
I think it is cool. I know it is a disadvantage for deafies, but hey, it will come around soon. And the technology is getting better and better. Actually, the reason why I post this is because I love PEPSI! 
BBDO created a subway poster that has a fully functional headphone jack imbedded in it, which plays samples of various exclusive tracks available at pepsiaccess.ca. There are close to 100 posters playing 12 different tracks running in Toronto and Vancouver from now until the end of summer.
Every Pepsi comes with a PIN, which can be redeemed for access to ultra-exclusive music, concerts, events, etc. at pepsiaccess.ca. This poster plays a 30 second track sample of “Crazy” by Gnarls Barkley. After an announcer says: “That was a taste of an exclusive track from Gnarls Barkley. Check out pepsiaccess.ca for more.”
