Well, we got into these businesses from meeting industry insiders and specialists. You sit down with people, chat, and find out business opportunities. Just today we evaluated festival, trade show and expo opportunities; took me about 10 hours to study the industry and see potential, I am still evaluating it, but there is no reason for YC not to understand it fully.

Seems like the whole startup scene is focused on web-based tools and utilities, while we're focused in real-world businesses.