Another Step Towards Universal GIS?

The Google Operating System blog today announces a new feature: Create Personalized Google Maps.

This is a tool to allow users to create personal geodata files, in the KML format, using an interface integrated with Google Maps. The resulting data sets can be held privately or made public.

This looks like it could be a useful tool for allowing public creation of geo-enabled information, but I note that it appears to lack any notion of metadata.

I'd also be interested to know whether the eventual collection of published KML files can be set as a node in the national system of metadata collections. Am I crazy to wonder if this data might not one day be discoverable via the Geospatial One Stop?