Knowing that most of our Monarch users are real Excel power users, I thought this might be of interest.
This is an excerpt from David Gainer's MSDN Blog, who is the Excel program manager at Microsoft.
"Currently, the Excel development team is spending a lot of time tuning Excel 2007’s calculation performance to make it as fast as possible. Given the near-infinite variety of things we see people build in Excel, we are always looking for good examples of workbooks that are calculation-intensive to help us compare Excel 2007’s calculation performance with previous versions’ performance on real-world files that matter to customers."
It looks like this is a limited time opportunity, so you need to act quickly.