Mapufacture can import, and automatically keep up to date, maps created with Google MyMaps. MyMaps provides an easy way to mark locations and draw lines and areas.
Go to http://maps.google.com/
Click on the "My Maps" tab
Click "Create new map"
Give it a title & description
Click "done
Now search for locations (names, addresses)
When you find a location you want, click a marker and then click "Save to My Maps"
Choose the appropriate map from the drop-down box
Enter any title/description/maker type
Click "OK"
Continue for all points
When you're done creating points, click on your Map in the right-hand sidebar, and then you should see a "View in Google Earth" link above the map. Right-click this and save "Save Link" (or the appropriate for your browser).
Now go to http://mapufacture.com/feeds/new and paste this URL into the text box and click "Add Feed". Mapufacture will import the feed and you can now use it in your Mapufacture maps.
In addition, Mapufacture will intermittently check your Google MyMaps to see if there are any updates or new markers that we will import. You don't need to "add" the feed to Mapufacture again, we'll take care of it for you.