I am interested in knowing about what kinds of businesses are heavily reliant on Microsoft Excel for their reporting functions. I'm looking for consulting opportunities as I'm aware that spreadsheet error due to poor design is rampant. Excel is a great product, assuming it is properly used.

Also, having identified a target business, how do I go about getting them to let me examine their spreadsheets and processes? I have yet to establish myself as a consultant, so I doubt that businesses would be open to an approach such as, "Hi there. I'm a complete stranger. Please let me look at your business critical spreadsheets..."

Any suggestions?