Aaron Brazell

This plugin is for developers and is meant to be used to enable Google Maps integration. While it does come with a default location, developers will want to feed the plugin a nested array of location data. This data can be manually curated or retrieved through external means.
You need to use the filter <code>ab_google_maps_markers</code> and return the new nested array.
Example:
<pre><code>function new_array( $markers ) { $markers = (object) array( 
 array( 
 'lat' => '30.266132', 
 'lon' => '-97.745825', 'title' => 'Gingerman Austin', 'address' => '301 Lavaca St, Austin TX 78701' ), array( 'lat' => '30.2658', 'lon' => '-97.735691', 'title' => 'Easy Tiger Bake Shop and Beer Garden', 'address' => '709 East 6th St, Austin TX 78701' ), ); return $markers; } add_filter( 'ab_google_maps_markers', 'new_array' ); </code></pre>

Google Maps Shell

This plugin is meant to be used in conjunction with external code that provides necessary coordinates to the plugin.

Aaron D. Campbell

This plugin allows you to easily insert <a href="http://maps.google.com" rel="nofollow ugc">Google 
Maps</a> into your blog, making use of the new shortCode system in WordPress 2.5. 
The maps can be configured to offer directions to or from the location, show or 
hide the zoom/pan controls, show/hide map type (street view, satellite, etc), 
activate zoom using mouse wheel, and more. PHP5 Required.

Google Maps for WordPress

This plugin allows you to easily insert Google

Google Maps Shell vs Google Maps for WordPress