This tutorial shows you how to feed data directly from a Google Spreadsheet rather than from a file. The advantage of this is that you can edit your data in Google Spreadsheets' user interface. Here is an example.
Once you’re through with this article, there’s a followup that shows how to also make them clickable. Many people find the object-oriented aspect of JavaScript to be very confusing. Fortunately, the designers of the Google Maps API have managed to ma