Fears of racism had dominated the build-up to the tournament and there was an inevitable feeling of relief when the opening game finally got under way in Warsaw.
At the Cup season-opening Daytona 500, Michael Waltrip drove a Toyota with a paint scheme supporting a relief fund for victims of the Sandy Hook shootings.
Last year Interactive got attention for a community effort that was completely unplanned and that didn't spring from the fest itself: After earthquakes and tsunamis devastated Japan on the opening day of the festival, attendees launched "SXSW4Japan, " which raised funds for relief efforts.