Seems that Echochrome will be coming soon.
The brain teaser echochrome is finally getting a US release. The PSP version of echochrome will be a downloadable title, available in early May for only $10. All the content featured in the PSP version will be unique to the system (and none of the content from the PS3 version will be in the handheld version either).
Ripten writes:
You may have guessed it but echochrome is now available for download from the Japanese PlayStation Store for the PS3 and PSP. That's right both. If like me you don't know a shred of Japanese, fret not because an English language track is available too. Stop reading and go download.
a member of Gametrailers Forums has Notified us that Echocrome Demo is live in japanese PSN store for Download
Videogamer reports that Sony has confirmed release dates for a host of upcoming PlayStation Store titles, both for PS3 and PSP via the PC PlayStation Store.
If you're intent on getting an early run of Echochrome, then you may want to keep an eye out on the region's PlayStation Network. SCEJ has recently announced that they will be releasing a demo of this puzzle title for both the PSP and PlayStation 3 on March 6 (Thursday) next week. That's 13 days before the full game's release.
While continuing to dig around for a solid answer on the PSP version of Echochrome I spoke to Scott Goryl, a Public Relations Specialist from SCEA, who told me Echochrome is actually on target for a Spring release in North America. However, this date is currently only for the PlayStation 3 version. They are evaluating the PSP version and if they will bring it to North America or not. (This is consistent with the earlier report I wrote up.)
The PSP version of Echochrome costs twice as much as the PS3 version, but Siliconera explains there is reason for the extra money. All of the answers are found over at Impress Watch (Japanese).