Malcolm

An interactive map can be added to your website by adding a single shortcode. The location the map can be specified either by shortcode attribute or URL parameters. Other (optional) values can be added to specify the scale of the map, screen size in pixels, and the map type.
Features Summary
<ul>
<li>Provides a WP wrapper for the Microsoft Bing Maps AJAX Control</li>
<li>Adds an interactive map to your WordPress Post or Page</li>
<li>Location specified in shortcode attribute</li>
<li>Image size can be specified by optional shortcode attribute</li>
<li>Map scale can be specified by optional shortcode attribute</li>
<li>Displays Ordnance Survey Mapping (GB locale only)</li>
<li>Shortcode Attributes can be replaced by URL Parameters</li>
<li>Requires a Microsoft Account and Bing Maps Key</li>
</ul>

MapView for Bing Maps

The MapView for Bing Maps plugin adds an interactive map(s) to your Wordpress Page or Post, using the Bing Maps AJAX Control.

owencutajar

The GeoWidget plugin displays a map in your sidebar that can be used to show where you live. You can use it to show any point on the map; where you work, where your idol lives or even where you want to go on holiday. The plugin works both as a widget or as a stand-alone component you can add to your sidebar.
Most information at: http://www.u-g-h.com/index.php/wordpress-plugins/wordpress-plugin-geowidget/

Geo Widget

Add a map to your sidebar. Select a map view from your Admin console. Widget friendly. Uses Microsoft Live Maps.

MapView for Bing Maps vs Geo Widget