I'm not sure what you are trying to promote exactly, but you've also got Myspace and Facebook that you can promote for free on besides Craigslist.
You can also join this new social/networking site below, which pays you to develop your network. It's totally free to join.
Check out this site. It's similar to the other big sites like myspace, only it PAYS US to create a profile and invite friends, businesses contacts, and anyone else you want to stay connected with.
If you only do one thing to better your lifestyle, join this site today and manage your new found wealth! By the way, it's totally free.
To get a better idea of how simple this is and how much money you can earn check out this slide show (
http://www.6dgr.com/6dgr_Explanation.pdf)
If you have any questions take a quick look at the FAQ's (
6dgr)
SIGN UP HERE using my sponsor link so we both get credit and stay connected {http://www.6dgr.com/index.php?mode=join&ref_id=1532}
Saan