Map Faire is a new Google Map creation tool that is very easy to use to create your own map with its own URL. This data can also be used with free illustrator designs: Free vector map USA, Adobe illustrator.
To create map markers to your map all you have to do is click 'Add a Point", fill in the information that you want to appear in the information window and drop the pin at the correct location. If you need to adjust the location of a marker you can simply drag it to the correct place on the map.
Once you have added a map marker to the map it is also listed in the map sidebar. When you have finished adding all your markers if you click 'Save Changes' you can then choose a URL for your map, which you can then share with your friends, customers etc.
The app creators are currently working on adding features that will also let you set colours, a logo, marker images and map styles.