I encourage you to use Port 80's Charthouse to find a forward-thinking product or service. Pay special attention to the ideas about how the Internet drives change. Apply the business models and think outside the box. Then pitch your idea as though your next paycheck depended on it. In the folklore, the diagram is what you draw on the napkin.
Arrows show the revenue streams.
Marketing Site Features form You will use several commercial web sites to illustrate one feature, such as catalogs or shopping carts. Everyone will report on a different feature. Organize this tour around the features rather than the sites. That is, don't take us to a site and show us around. Instead, define a feature and then take us to specific pages on a variety of sites that exemplify it well and poorly.