[WorldWideWayne]

It's a great idea. I built a whole reporting package that basically rendered to Excel and it was a real time-saver vs developers creating one-off Excel books and writing custom code to fill them in.

Rendering to Excel isn't the difficult part though (unless you're trying to do it equally well on all platforms I guess). Creating a new language/DSL and all of the other features you mentioned are the riskiest parts of this venture.

So, can you do it? If so, do it quickly and then sell it to Microsoft for a couple hundred million :)