If getting an API key is beyond the skill set or desires of your users, but they still want to be able to have a Google map, this plugin is the answer. It adds a button to the visual editor that allows them to use the link from Google Maps to embed a plugin. Blog administrators can set defaults for width, height, marginwidth, marginheight, frameborder, and scrolling properties for the embed code. Users can override these defaults when they are creating a post or page. Power users can directly enter a shortcode in a post, page or widget.

1.1 version adds a quicktag to the html editor, opens the larger map in a new window, and defaults to map view instead of sat view.

1.3 version fixes a few bugs - most notably that the quicktag version didn't work without another plugin enabled. (Note that 1.2 was an unreleased version.)