SXSW 2010 was held in Austin, TX and focused on digital culture, new media, and emerging technologies. It attracted over 15,000 interactive participants from 31 countries, a 40% increase from the previous year. Notable attendees included Ashton Kutcher, Evan Williams of Twitter, and Gary Vaynerchuk. Sessions focused on social media and business, user experience, and how technology is accelerating cultural and societal changes. Emerging apps like Foursquare and Gowalla that leverage people's locations using mobile devices were discussed. The effectiveness of using new technologies like quick response codes and social media for real-time feedback was also examined.