Control camera movement with mouse in bge? Is there a way I could make the mouse look actuator use translation values instead of rotation? 

The idea is to move the camera left and right instead of just rotating it.
You can probably edit the python script found here 

http://www.tutorialsforblender3d.com/Game_Engine/MouseLook/blend/MouseLook249.txt

follow the tutorial
http://www.tutorialsforblender3d.com/Game_Engine/MouseLook/MouseLook_First_3.html

just change this part:

# set the values
act_LeftRight.dRot = [ 0.0, 0.0, leftRight]
act_LeftRight.useLocalDRot = False  

act_UpDown.dRot = [ upDown, 0.0, 0.0]
act_UpDown.useLocalDRot = True


to :

# set the values
act_LeftRight.dLoc = [ 0.0, 0.0, leftRight]
act_LeftRight.useLocalDLoc = False  

act_UpDown.dLoc = [ upDown, 0.0, 0.0]
act_UpDown.useLocalDLoc = True


Hope it works.