All entries remain the property of their creators, in as much as open source allows. If you enter the Challenge, you should be prepared to have your application on display for up to a year, even if it doesn't win. You don’t have to have your name shown. Neither the Challenge team nor the organizations sponsoring it will ask for or claim ownership of anything submitted. The intention is to let other people see all the cool stuff that got created, share ideas, promote mashups, and hopefully inspire you to take it to the next level.