echochrome is supposed to be available in the full version today at the Playstation store for the Sony PS3 and the Sony PSP. Both versions will be available for $9.99.

echochrome is one of these games that intrigues a certain group of gamers and does nothing for everybody else.
The puzzle game with rather simple graphics is based on the concepts of the famous MC Escher artwork, which explores infinity, architecture and impossible constructions.
There are 56 unique levels on the PS3 version, as well as 56 completely different levels on the PSP version (112 levels overall). So real echochrome fans should get both versions.
Via the Playstation Blog.