I recently started up Toad for SQL Server to find the following message on the news page:
Congratulations to Hank Freeman, winner of the 4GB Apple iPod nano Â® for reporting the largest number of bugs in the Toad for SQL Server beta!
Imagine that! You really want to stress test your project? Instead of just throwing it out there, and hoping people have time or concern to report bugs, make it into a contest. Challenge people to find something, and reward them for reporting it. Its free publicity, and it shows confidence in your product, and a love for your users.