FSBO sites? Recommendations?

We've had 6 building lots listed with a realtor for 6 months now -- only one showing by the realtor -- and we're going to go FSBO (for sale by owner) with the lots as soon as the listing agreement expires. Any FSBO sites / marketing tactics you would recommend? We've had some traffic via our own web site http://rdplakechapala.com/haciendaaltaandrdp.html and personal connections, but would like to increase the visibility of our real estate offerings.

One of the ones we used when selling FSBO back in 2006 was:
http://www.virtualfsbo.com/country.asp?country=Mexico

It generated numerous inquiries and a number of people of people interested enough to visit the home.

I know some people that recently sold their house thru www.lagunachapala.com/FSBO. Not totally sure, but I believe they charge NO commission, have 1st three months free right now and then something like 100 pesos per month fee. The site is run by a local couple who advertise one portion of their business (Monarch Hosting) on this site. Really nice people too.

Thanks Tex and CheenaGringo! We'll try both those sites, once we're out from under the listing agreement.