Songkick.com is an events site, for live music events around the world, and they're awesome. They've even got a plugin for iTunes to recommend you gigs based on what you listen to.
(I no longer work there, but their product looks better than ever.)
(I no longer work there, but their product looks better than ever.)
So if they can't get it right, for a limited scope of live music events, it is clearly as tough to get right as others say it is.