I'm using SquidZipper to market my notary public business. If you build them correctly, they can be very powerful for attracting leads. I wrote a Squidoo lens about how to do this: Promote Your Real Estate Business for Free with SquidZipper lenses by Squidoo.

Most of the SquidZipper lenses I see are made hastily and seldom updated. Mine work because I link several of them together and create them for lots of zip codes in my coverage area. I suggest building at least three of them with different zip codes. Once the first one is built, it's a matter of cutting and pasting most of the information.