Trulia only accepts listings that are represented by a broker/agent. If you have an agent, have the agent do it. As an owner, you may create an ad in the blog section, and even upload photos and videos along with posting links.

Whether you are represented by an agent or not, the blog attached to the link below may be of some interest to you. While it is directed to FSBOs, even if you are represented, there are even some ideas in it that you could possibly use to augment your agent's marketing plan. Please if represented, always keep your agent abreast of anything you do on your own, and use your agent for the contact person. Good luck.

http://www.trulia.com/blog/rockinblu/2008/08/thinking_about_…

Go to Your Profile - Your Listing - and then Submit Your Listing to create it.

Good Luck!