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.
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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).

The PlayStation 3 version is actually "Echochrome: Jokyoku" or "Echochrome: Prelude" in English. For 1,800 yen ($17) you get a get a sample of Echochrome by tasting 50 puzzles. The 3,980 yen ($37) PSP version contains 100 puzzles and multiple modes including a variation where you have to avoid walking dark echoes.

Fortunately, both versions come with canvas mode, which lets players create and upload puzzles on the PlayStation Network or transfer data via the PSP's Ad-Hoc mode. With this new information the PSP version is more tantalizing. However, the cheaper PlayStation 3 version supports users-created content, which devalues the addition of the extra 50 puzzles.
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Gamernode: The unique puzzle game, Echochrome, will land in Japan on March 19th. It will be available both as a PlayStation Network download for the PS3 and in UMD form.
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So you think that 2008 is all about consoles? Well check out these upcoming releases exclusive for the Playstation Portable and you'll see why the PSP is here to stay.
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Siliconera » Written by: Spencer on January 16th, 2008 @ 9:10 am

Last week Spencer mentioned Echochrome was arriving on the PSP on March 19. Now he can confirm it will arrive on the PlayStation Store as a downloadable PS3 game on the same day. The price has not been announced, but if Sony is selling the PSP version for 3,990 yen ($36) it will probably fall in the $25-$30 price range. Details are also hazy if the PSP release contains the same puzzles as the PlayStation 3 version or if you can play the PS3 release on the PSP via Remote Play. That would be an awesome idea and we'll find out soon when Echochrome arrives in Japan.
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[UPDATE] While we're not backtracking on our opinion that Echochrome has the potential to be one of the sleeper hits of the PS Network, we've just found out that the game was far from Sony's "original" idea. The game has existed as a tech demo for PC here since last year, described as an "interactive optical illusion" and coded by one Jun Fujiki. It appears Sony has been given permission to develop this free game for the PS Network, only with preset levels - the downloadable version simply ... » Read More

Sony's annual E3 press conference opened with what could have been the biggest reveal of the entire show if it hadn't been leaked last week: the new $499 price of the PS3, as well as the introduction of a new $599 model that comes with an 80GB hard drive and a copy of online-enabled dirt racer Motorstorm. This left biggy-wig Jack Tretton (who began the event speaking through his character in the PS3 virtual world Home) to launch right into the publisher's game-centric, four-part ... » Read More