Groupon just launched a new way to get in on deals nearby — Groupon Now. It lets you search online (at a computer or via your smartphone) for deals near your address or zipcode (currently only in Chicago). Once you buy the deal, you'll only have a narrow window of hours that day (displayed on the deal before purchase) in which to use it. Want to find a place with a dining bargain near the art museum, or a deal on a guided tour to distract, er, entertain the in-laws? This might be a great on-the-go solution for the last-minute planner.