I like the design but the grey font is a bit hard to read against a black background for me.

The fading coloured squares which fill space look pretty but they were confusing to me - are these links to more pages of results? Mousing over them in Chrome changes my mouse pointer as if they were links, so it took me a few clicks to decide they don't do anything. I like how they look so I'm not necessarily saying get rid of them; maybe just put some text over the top making it clear that the user has seen all the results.

Seconding other people's comments about Facebook and Twitter integration.

Finally, I see you've recorded the location of artists, and I'd love to see a browse by location to see if there are any local-to-me acts on here.

Good luck with the site!