Update: This giveaway has now ended and the winners will be notified by email. There is a very good chance that you have already heard about ThemeFuse, who create premium WordPress themes and are regarded as being the top in their field. We ran a successful giveaway with them last year.
Mark announced the new WordPress plugin competition. The past plugin competitions have been highly successful which have helped benefit the WordPress community with excellent offerings. I'm sure this years will be the same if not better.