In our experience (Mixpanel), your goal should be conveying what you're doing in the most basic form (nothing convoluted), getting all of them behind your compu

In our experience (Mixpanel), your goal should be conveying what you're doing in the most basic form (nothing convoluted), getting all of them behind your computer checking out your demo with pg interacting with it, having pg throw out suggestions on what your product could do, and having Jessica distracted about the time limit while telling you "we're already 2 minutes over guys." If you can do that I think you've sold yourself reasonably well as long as market size is reasonably resolved as an issue. I would say showing that you're passionate about your company is important but it's not something you can make up. Having an actual product with real customers can easily help you prove your case. I don't know if we would've got in without Garry from Posterous' help, so Tim and I are happy to grab coffee just like Garry did with us right before your interview and hear the pitch. Just let us know: support@mixpanel.com (goes to Tim and I)