When you have an idea for a new product, it’s easy to fall in love with your own thinking. How do you make sure you get third-party, left-brain perspective?

Spigit for startups is a community of people who are interested in providing feedback regarding startups. If you’re considering launching a web-based business or product (though some non digital products are featured as well, such as these wind turbines), here’s a good way to get some feedback. Members of the community are provided a place for describing their new product or company. Then, other community members provide feedback and vote on the viability of the effort (spigs are good, scraps are bad).

While there’s a gaming aspect to the site (a mock stock market), what tends to be the most helpful are the individual comments, often highlighting competitive products or feature deficits. If you’re looking for some fast and inexpensive feedback, consider starting with Spigit.