I remember a while back I mentioned the previous version of Songkick and they took onboard quite a lot of the DiS communities (constructive) criticisms. They've just launched a new site (aimed to be 'the IMDB of live music', I think is the 'pull quote') and I really like it.
They're friends of ours. We're hoping to tie in some of their functionality over the coming months, so I'd be curious if you've used it, what people think of it, etc.
My profile is here if you wanna add/stalk me: