On December 11th there will be a addon available for the PS3 version of echochrome on the Japanese PSN with 1000 levels for free. 1000 user generated levels that is. As of now there are no news if they will become available outside of Japan, but it's a safe bet, that they will.
I always wondered why you can't keep the weekly levels you get. And 1000 levels to play through adds a lot of value to the game.
Earlier there was news about echochrome getting the trophy treatment. I wonder if they will go together with this or if they will get released later.
Official announcement site