at http://www.DesignContest.net besides guaranteed contests we have community contests where we run contests for our designers to have fun and practice their skills. We would like to have our t-shirts sent to the winners of the contests. You can be the sponsor and what you will get:

1. a message about your company and your services (including your url) in the contest's thread that will stay forever on the forums.

2. a message about your company in the newsletter about the contest sent to over 3000 of our members.

3. respect of our members.

more info on how to sponsor a contest