look at these queries that will give you results: http://www.google.com/search?q=freelance+"submit+link" http://www.google.com/search?q=freelance+"suggest+link" http://www.google.com/search?q=freelance+"add+link"
it also makes sense to have a referral program where you get your existing users to get others to register.
Thats a great tip, will definitely use it - thanks a lot! Google is always the first step..if that fails, DP!