Media Molecule (via PlayStation Blog) have announed that Tearaway won't make it out on its original release date (October 23), but will instead see release on November 22.
"Tearaway is our first handheld game, set in a totally new world, with characters on a new adventure. Throughout development we have constantly explored all the ways we could think of to create the most fun and enjoyable experiences possible on a PS Vita, whilst also learning how to make a 3D creative platformer! We are really proud of the work we are doing, and are really excited to share it with you!
We are now in the final stages of development, and have come to the realisation that we need a little more time than we anticipated to finish the game; to tie all of the mechanics, story and amazing visuals together into the adventure that we want you to play. To give us that time, we've decided to move the release date by one month, from mid-October, to November 22nd."