It's a long time since I first heard of the Winterbottom game, but "The Misadventures of P.B. Winterbottom" came out on Xbox Live Arcade at the end of February 2010.
I played a little, then decided to buy a copy of my own and played through to the end.
Take a look at the external links above if you want to see some screenshots.
It's a collaborate-with-yourself puzzle/2D platformer with time manipulation elements, wrapped up in 1920s silent-film style graphics and a story about stealing pies. I like the style and the comedic simplicity of the story makes it charming.
Think Cursor*10, The Company Of Myself, and Braid (minus the annoying self-serving story) combined together... and you'll be almost there.
It's part action game and part puzzle game, but neither is compromised. Unlike the games I mentioned, your copies are not just ghosts - you can change what they do by hitting your copies to propel them, or get them to propel you by having them repeatedly strike thin air, then walking into them. There are also time trial and minimum-copies-made trials in the bonus levels, for those most interested in the action aspect, and those most interested in the puzzle aspect.
Overall, for a commercial game it is a bit short, but the levels have been well crafted. Maybe it could have done with a level editor and some way to share levels via Xbox Live Arcade.
