Billboards are so damn stoic—it's nice to come across one that has real feelings. Or, at least, app-enabled emoticons. ADstruc, an auction and listing-based marketplace for outdoor advertising, put this particular billboard up near the Holland Tunnel in downtown Manhattan. "Today I'm feeling…" it says. If you download a special app for your iPhone and aim it at the board, you'll see little emoticons appear, indicating the often-fragile interior state of the otherwise impressive-seeming mass-market communications medium. You can also switch the emoticon, capture the image, and send it to your friends to tell them how you're feeling. It's all very emotional. The board was created by Tronic and sponsored by JWT New York, SPREAD Art, Fuel and Culture magazine.