Wordpress widget - "Locations near..."

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
About the website:
The website is made on Wordpress, which features gardens and parks in The Netherlands and Germany. All gardens are Wordpress users, as they are able to edit their own "Garden page", aka the Wordpress author page. These authors pages are edited with the use of the plugin Cimy Users Extra Fields and all data is stored in the database. Garden owners can edit their own page, post news and columns on their own page and suggest news for the front page. The website is in the Dutch and German language.

I need a widget/plugin that shows three gardens near the garden being viewed. So let's say we look at garden "D", I want to see three gardens (for example C, E and F) that are closest to this garden with a thumbnail, address and internal link to the garden page. All addresses are stored in the database.
I suggest using the postal code as variable to determine the gardens close to the garden being viewed, but this is up to you.

Within a week

Files and resources available:
Database dump, complete backup of installation of Wordpress and if necessary complete access to live version.

Looking for serious developers!

Additional Project Description:
09/25/2012 at 9:02 EDT
Display of "Gardens near..." should be in the sidebar.

Skills required:
HTML, MySQL, PHP, Wordpress
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.