Eino Tuominen

This is a simple plugin to add google maps to any page or post with a short code
Features so far include:
<ul>
<li>unlimited amount of maps</li>
<li>unlimited amount of markers and admin editable polygons on each map</li>
<li>markers and polygons can have description text that are shown with click</li>
</ul>

Eino Tuominen's google maps

Add google maps with editable polygons and markers with descriptions

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

Eino Tuominen's google maps vs Google Maps for WordPress