I'm looking now too. I think there is GasSouth for 20% off and I have www.ticketmaster.com/BLUE2 where you can get a $4 of $8 discount too. You have to go there and enter BLIE2 in the promo ticket selection box. I wish I could get half off somehow.
BTW - anyone have feedback about whether it is worth it to buy mid range seats or if cheap seats are fine.