Nikon has a new photo contest called Inspiration: for each of the next four months there is a different theme and you can submit your entries to win some nice lenses. Here are the details:
Check the official rules and fine print here before submitting your work (available only in the US):
“[…] each winner hereby grants Sponsor and its affiliates, licensees, successors and assigns a royalty–free, fully paid–up, irrevocable, perpetual, non–exclusive right and license to use, reproduce, modify, publish, distribute, copy, edit, create derivative works from, and display each winner’s Submission […]”