Presentation: Did they make a logical, understandable and clearly articulated case for their idea?  Do they appear ready, confident, capable of presenting to investors/partners?

Viability: Is the market opportunity compelling?  How sustainable/profitable is the business model likely to be?  If a social venture, how likely to serve stated social goals?

Overall: Based on this presentation I want to learn more – I would move to the next level of due diligence