It's been called the biggest industry party in the world — nearly
150,000 attendees, 80-plus venues, and more than 1,800 acts, including
Ben Harper this year. But SXSW veterans know the annual
music-and-more festival's most talked-about events often belong to no
industry at all. Unofficial film screenings and seat-of-the-pants jam sessions
draw clusters of festivalgoers to clothing stores and parking lots
across the city.