From the Model Mayhem FAQ:

How can I network and get hired on Model Mayhem?
There are lots of ways you can network with Model Mayhem, and lots of ways for your profile to get seen! Here is a sample of how you can network:

  • Post an announcement on the home page
  • List your project as a casting call
  • List your availability to work as a notice
  • Share your travel plans to the cities you’ll be travelling to
  • Browse other members and see who is in your area
  • Communicate with other members in the forums
  • Post TAGs to other member’s pages
  • Use Verified Credits to show who you’ve worked with