Groupon offers a exhibits hall pass to the Macworld | iWorld Conference & Expo 2013 for $10. That's currently the best discount we could find for Macworld | iWorld 2013, although we saw an exhibits-only pass for free four days ago (since expired). Macworld 2013 will run from January 31 to February 2. Online registration required, which ends January 30. Deal ends January 15 at 2:59 am ET.