A job listing suggest LittleBigPlanet developer Media Molecule has a new project in the works, "on a portable platform".
"It's on a portable platform..." the post trails off, suggesting we ought to be able to guess which one.
Something very like LittleBigPlanet NGP was demonstrated at Sony's reveal of the new handheld.
In response to media scrutiny, Media Molecule co-founder Alex Evans said "At the moment I'm afraid we've got nothing to announce regarding any projects... sorry. We'll have to leave the world speculating a little longer..."
Thanks, That Video Game Blog.