This is a sample of what you can submit. Use the File Attachment on the Options tab to attach files.
This is a custom control that shows a Reporting Services report (in this case a graph) for the currently selected Customer. NAV tells the .NET control which URL to use for the report and the control displays the ReportServer URL results with menu options to export. See the attached PDF doc for more details.
If you have questions about the competition, you can post them in reply to this post.
I should have said that you can write as much or as little as you like about your idea. The more you write, the easier it is likely to be to communicate the full awesomeness of your idea, but no more than a couple of pages please.