According to IGN, Beautiful Katamari which was supposed to be released on the PS3 and Xbox360 has been cancelled for the PS3.
Due to some problems with the PS3 port and the stalled sales of the system it had been cancelled.
Looking to better-than-expected sales of Wii they decided to re-concept the game for the Wii.
How ever, as this information comes from sources close to Namco Bandai and not Namco themselves, you should concider this to be a rumor until IGN gets official information.
edit: forgot the source xD : http://wii.ign.com/articles/800/800761p1.html