I think this is an area that is screaming for innovation. Top problems with excel: * Much of building a spreadsheet model is copy and paste programming, eithe

I think this is an area that is screaming for innovation. Top problems with excel: * Much of building a spreadsheet model is copy and paste programming, either literally, or aided and abetted by the ability to "fill" * you can't easily diff different versions of a workbook to see how the code has changed. I'm sure there is more, but I haven't had to really do much in Excel lately, so I've blocked out a lot.