HN should put a little entrepreneur badge next to your name for having shipped a product. That would motivate some people.
http://news.ycombinator.com/item?id=363
In terms of an easy implementation, it could be something users self-manage on the honor system, and perhaps a "ship" icon could link to the product if applicable.
Dan Ariely has a short podcast titled "Why peer recognition is worth more than monetary compensation" where he talked with economist Bruno Frey. He has a number of papers on motivating people with awards and prizes.