http://electricdaisycarnival.com/Chicago/
Basically one of the largest EDM festivals in America decided to add a 3 day fest in Chicago(land area) this year. No details released other than ticket prices ($175 without camping, $295 with) the dates (Memorial day weekend) and the location (Chicagoland speedway in Joliet). I'm fairly certain I want to go, but I'm hesitant to spend that kind of money without knowing even a couple headliners. Oh and also it's part focused on rides and other cerebral/physical experiences. Anyway it looks like last year in Vegas (the main festival) they had quite a lineup including a couple of the artists from the terror twister 2 soundtrack and both artists involved with the "techno song" played in the batcave.
Anyway here's the trailer for the 2012 Electric Daisy Carnival in Vegas: http://youtu.be/GRs7a-wDlno