Look at one of the flat fee services that'll get you listing into an MLS for a nominal sum. I would assume at least some of these services would get you listed on sites such as Trulia.
As to Keith's anti-FSBO statistics -- they may or may not tell the true picture. At least know there are dissenting views (see link below). Also do a Google search for 'nwu fsbo' to see the results of a study that compares full service representation versus fbso w/ MLS listing.... more