According to Soshified and other kpop news sites:
"Tickets for the concert will go on sale on Wednesday, July 18th, at 10 AM PST. Tickets can be purchased through the Home Depot Center box office, online at www.axs.com, or by calling AXS over the phone at 888-9AXS-TIX.
Organizers for the concert have also opened an official Facebook page for the event, which shows several video messages from the artists inviting fans to the concert."
I am only considering going because of Kara, so if something is organized here at a reasonable price that is the only condition under which I would go, but here is the ticket info in case anyone missed it.