are available commercially at around $150, but it will take time to gauge their impact. In New York, people can try out the oPhone at The American Museum of Natural History during three weekends in July. oNotes add a new dimension to telecommunication. The possibilities for the technology are vast: scent messages could be aromatic pictures of a cup of coffee, olfactory tweets from a wine tasting, scented sounds from a family dinner party, or even a promotional campaign for a restaurant. “One day, fairly soon, any user of a mobile phone anywhere will not only be able to receive a scent message—invoking a culinary pleasure—but quickly send another back, similar to how we exchange audio information today with friends around the world,” says Edwards. So far, oNotes are limited to scent-tagged images composed in oSnap, a free mobile messaging app for iPhone devices. Whether that is the scent of success is too early to tell.