Don't think you can use the M & K I played the demo off the US store and it was controller only. As good as the attempts to make it playable on the console is I don't see why they wouldn't add this in instead it will surely turn most people off. I can only think the reasons are:
1) Unfair in multiplayer for the people that have the keyboard and mouse
2) Not everyone has a suitable table/surface to place the mouse on while playing
The water in particular is much better than on my 2006/07 PC though with a 7950 GX2!!