USATODAY.com - Thirty-eight football fields! That's about as close as I got to "pinpointing" my wife and daughter's whereabouts the other day during one attempt to find them via the cellphone in my spouse's purse. I was testing the Sprint Family Locator by WaveMarket, an LBS, or location-based service, launched by Sprint Nextel.{br}{br}View the Entire Article{br}{br}Click Here to Launch in a new Window