If you're just searching for some upcoming concert tickets and a place to buy them, there are plenty of online vendors. What about concert history and memorabilia? That's where Songkick comes in.
Songkick solicits reviews and information about past concerts from users, and allows everyone to view memorabilia like show posters, ticket stubs, music and video clips, and more. You can search and enjoy most of the features of Songkick without an account, but if you want to enjoy the social side of the site, including the ability to track concerts you've been to, you'll need to sign up for a free account.
For more concert-related fun, check out how to shoot concerts in black and white.