Icebreaker is a physics based puzzle platformer being released by Nitrome studios. It looks visually impressive and while the trailer doesn't exactly highlight the gameplay, you can see there will be lots of slashing and physics manipulation. Looks fun. Have a gander for yourselves.
There is no release date planned as of yet. According to their website, they are 80% complete, so my estimates would put this towards an early 2013 release. We'll update information as it becomes available.