I don't think I've fully recovered from my three weeks in Indio for the twin Coachella Valley Music and Arts Festivals and the Stagecoach Country Music Festival, but it looks like we're getting details on Monday about the 2013 edition of Coachella.
Goldenvoice posted an image of this year's festival with the words "Monday 10AM PDT" on it. (See above)
Last year, Goldenvoice announced that Coachella would be expanding to the twin editions and offered a limited pre-sale layaway program around this time so that's my best guess as to what we might see, and probably the dates for 2013.
In the meantime, you can re-live all of the fun of Coachella 2012 over at the iGuide Coachella page.