This is a great place to keep up with who is coming to or near your town. I use it to find out who is playing in towns I happen to be visiting too. They e-mail me about who is touring in my area. Also you can customize it to your style of music you want to be informed about.
Nicely laid out site that allows easy navigation. You can search for concerts via band name, city or even venue. Also has pretty thorough news updates and is not limited to any particular genre of music.