Next Big Sound is a forthcoming music tracking service for \"the industry\" to get an overview of how a particular artist is trending throughout the Internet. There\'s a lot of data out there and getting it all into an understandable format is not easy. Others have tried it and NBS says they\'ve got a system better than the rest. To prove it, they\'ve got a SXSW Overview running that shows the fastest rising bands during this years festival. How accurate is it? There\'s no way to know really but it looks great and there\'s really no reason to doubt it.. so check it out.