According to Newsweek, Japanese puzzler Echochrome will not be released on UMD in the US.
"It will be coming to North America via the Playstation Network store only - i.e. not brick and mortar retail - with its own unique 56 levels," it says here.
Still no firm release date for either the US or Europe. If it's not going to make disc in the US you can bet your maiden aunt there's no way it'll be out on UMD in Europe. We'll check anyway.