By Chris Richardson (http://wphostreviews.com)

MapPress makes it easy to insert custom Google Maps into your blog. Once installed, you will have the option to add multiple locations by address or lat/long. You will need a Google Maps API-key, which can be obtained from http://bit.ly/gmap-api. Google requires users who customize maps to have an API key. This allows them to track usage and ensure that people are not using Google Maps outside the 'Terms and Conditions'. If you do not have a need for customizing the content on the map, then you could always bypass installing this plugin and use the embed code directly from Google Maps.