Roadshow has just announced that on 30 December it will be releasing Piranha 3D on Blu-ray 3D, followed by Cats & Dogs 2: The Revenge of Kitty Galore as a two disc release with Blu-ray 3D on one and the regular 2D version on the other. This will appear on 7 January 2011.
Update (11 Dec): Fixed title (ie. ‘comment’ to ‘content’. Do’h!)