Nokia and Live Nations have gotten together to create an online service called Ticket Rush. This service is about a year old however, I just found out about it today.This site is stricly for North American concerts. This is a VIP program, which will give fans the ability to purchase premium seats, VIP parking spaces and special access to premium bar and lounge areas from its website. The site also offers a music search engine that provides information on tour dates, concert tickets, artists and venues. Live Nation owns, operates or has booking rights in more than 160 venues, which last year hosted 26,000 events in 18 countries. 

You give them your phone number and they text you when tickets to new shows are available fore purchase. Best part about this is that you get notified before the general public does.