Avicii will be there too, and USC are going to announce 2 more artists on Wednesday. I wasn't impressed with Avicii on the UMF youtube stream so the next artists will be the deciding factors for me. Either way I'm sure it will be fun though.
I think I am going to buy tickets for this. Afrojack, R3hab, Michael Woods, LA Riots is a decent start. Like I mentioned before I am looking forward to catching some EDM beside dubstep, glitch, hiphop.