Google Earth KMLs can now be viewed in Google Maps
Why is that important? Because not everyone wants to take the time to download and install Google Earth. Not sure why, but I'm not here to ask these kinds of questions. Do you want Aunt Flo or Gramps to see the great map you made in Google Earth but know they'll have conniptions trying to get Google Earth to work, send them the Google Maps KML.
You need the KML to be web-based (like in the Vassar College BBS site or the Google Earth BBS) and then it can be pasted into the search line in Google Maps.
Here's the cool thing...when you go to the Google Earth BBS, now you have two options, one for for downloading the KML and a new one for downloading the link to view in Google Maps. See the circle below. Hurray!!