danimalSK - 4:31 pm on Jan 27, 2012 (gmt 0)
Thanks Tedster. I work for the largest supplier of this kind of data and I'm pretty sure no-one is providing it for them. Afaik no-one in the industry collects data in this format.
I suspect they are taking event hcard markup from trusted sources and denormalising / aggregating it into an index of concert data. This is not a trivial problem because there is a lot of ambiguity and noise in concert data (e.g. multiple bands with the same / similar name, tribute bands). It's a much harder problem than dealing with cinema times, local business reviews etc.