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.)
I followed up with questions about the extra levels, if they would come out as a download pack, and if the canvas mode will remain part of the PlayStation 3 package. In response he explained, the feature list for the PlayStation 3 version has not been announced yet.