Startups are, at best, still in the fine-tuning stage of their products and services. People who participate in online communities are of a culture eager to offer input, ideas and answers to your questions. Pick their brains. Ask them questions, even if it's, "Am I crazy to attempt this?" If they think you're crazy, they'll tell you so and offer solutions. If they think you're trying to produce something of value, they'll likely give you the approval, encouragement and support you need to move forward.