I think it will be pretty much expected that people will be talking about their ideas at Startup School. I'll be there and would be happy to strike up a convers

I think it will be pretty much expected that people will be talking about their ideas at Startup School. I'll be there and would be happy to strike up a conversation about that kind of thing. However you may want to think what you'll actually be asking people or what you want to get out of it. If you're trying to validate your idea - are we even your intended customer? Alternatively you maybe looking more for some opinions on the technical challenges, to find someone to work with equally excited by the idea, info from people with industry experience, advice on the business side. Ask the right kinds of questions and hopefully you'll get more than a general 'neat idea' kind of response.