Trover is a social discovery service, which helps find interesting real-world locations/activities around you. It tackles the distance-to-events thing in an interesting way. As you scroll the events, the mileage … and icon to represent the mode of travel … changes:
The Eatery is another interesting app which encourages users to snap pictures of food, and then rate them as “Fit” or “Fat.” The rating is accomplished in a hot-or-not style with a nice interface twist: You see the picture, then drag it down to the star rating bar. Very slick, and runs very smoothly on my iPhone 4S.