The following script lets you add a Google Map to your Fargo noteblog.
With your cursor on the date headline, choose the script, and enter the following in the dialog box, in this order: Latitude, Longitude, and mapType (each separated by commas). If Latitude is South or Longitude is West, precede the value with a minus sign. The mapTypes are roadmap, satellite, hybrid, and terrain. For example: "41.0967,-73.5522,hybrid" is what I'm using for this post.
Although the attribute mapZoom is supported in Fargo, I am not including it in this script.
I don't check for errors in entry, so if there are problems, please check the instructions first. If you are still getting errors, please contact me.
Disclaimer: Dave Winer has not even written up documentation for this feature, so use "as is."
Here is the OPML for the script.