As it is in its beta stages, it is far from complete, but it is a step in the right direction and you may want to give it a try and encourage WAP Industrial in their endeavour to continue to enhance and improve what they refer to as 'a Mobile Clone of Excel

Basic functions are catered for and you can change column widths.
Hey, if Midlets can run 3D racers, I'm sure they can do number crunching!