Gruvr is a cool mashup of google maps and live event/show information.
You can specify a location and a radius to see details of upcoming shows, as well as looking for gigs involving specific bands. The app appears to make use of the Eventful API.
The map pans around the around highlighting events, with varying degrees of location accuracy and perhaps a little too fast, but fortunately there is a table of events.
There’s also a hatful of widgets you can use and the integration with MySpace is a key element.
The only bizarre thing is that the site contains no details of who is behind the site and how to team up with them – if anyone knows please get in touch with me as I’d love to chat with them.