Currently only Realtors can list homes on Trulia.com. If you are a FSBO, you might want to try craigslist.org...I get quite a bit of response from using it in the Knox/Blount/Loudon market area.
If your home is listed with a Realtor, ask him/her to place it on here. If you are a FSBO and decide that you need more exposure for your home, hire a Realtor with an aggressive marketing plan that includes internet/print/inter-office marketing.
Good luck to you. Let me know if you I can be of assistance.