KML files are “Keyhole Markup Language” files which contain geographic information for display in software such as Google Earth and within Google Maps.

According to Nigel Tao, the current version of Google Maps now supports GeoRSS (Simple, GML and W3C Geo) formats -- to import a GeoRSS file, simply "search" for the URL of one. Give this link a shot.

Google has added support for its KML (Earth) format and the open GeoRSS format to the Google Maps API. I’m not a programmer, but what this means as a practical matter is that the GeoRSS standard ...

Along with KML imports, the new iOS and Android apps have both received support for the Google Earth Gallery, a repository of maps that highlight interesting data like real-time earthquake info ...

Google's installable maps software Google Earth makes KML overlay files that add points of interest, descriptions and photos to your earth, and now you can view those KML files live on the web at ...

As part of the recent Google Maps redesign, the ability to export your map to KML was mistakenly removed. According to a post in the Google Maps support forum, the feature will be added back in to ...

The Google Earth custom maps features that allows you to view KML files, is extremely powerful and has now been added to mobile devices in Google Earth 6.2 for Android and iOS smartphones and tablets.

With the adoption of KML 2.2 as a standard, the OGC will now work with Google to ensure that future versions maintain backwards compatibility, use international best practices, and work well with ...

But, obviously Google intends to continue to improve KML support in Google Maps. Here is one very nice network link which works with Maps: UK Fall Foliage (read the story on it here).