TicketsNow is a good campaign - i'm not sure of networks that have it right now - but i'm sure some do. I would ask around.
AwesomeSeating.com has launched its affiliate program with ShareASale.com. http://www.shareasale.com/shareasale.cfm?merchantID=22490 You can put links and banners on your website's to AwesomeSeating.com and when someone completes a purchase reffered from your websites, your company will receive a 7.5% commission of the entire sale. The best is that there is no caps, the more tickets you sell, the more money you make!