Ask HN: How do I find a marketing person for equity?

Over the past couple years, I have built an online educational tool that combines a dictionary with flashcards and uses games to help users learn. The site is called WordStash and is at http://wordstash.com. The feedback has been great and the site is growing steadily. I do not have the time to work on the marketing and promotion of the site and would like to divvy it out for equity. How should I go about finding a person for this?