Today, Pebble is launching Kickstarter campaigns for three products. Only two of them are smart watches. It’s the third product that will garner the most attention. It’s a Pebble that’s not a watch. It is optimized for a single task: taking a run. It’s a white plastic and black rubber block, a little thicker than a mahjong tile, with an orange clasp that grasps a keyring. It plays music, has GPS and other sensors that can track activity, and a 3G cellular modem that allows it to work even if your phone isn’t on you.