Escher's world of Relativity will get their chance this
No news has been heard about a stateside release date for the pricier PSP version of the game, though Siliconera is claiming that a Sony rep told them the handheld edition is "up in the air". This isn't a death knell for the portable port -- we don't know why they'd cancel the U.S. version, considering that Japan's March release date is for the PSP as well. We'll let you know when we know a more definite release date for the two versions, until then, we suggest enrolling into some sort of MENSA organization in order to garner the massive, genius brain you'll need to navigate these impossible constructions.
Update: The PS3 version is on track for a Spring release.