You can now share maps from Placemark with a colleague or a friend just by dropping a link. They don't need an account - it's just a webpage. Here's an example, that map of those airports.
Sharing + analysis

But it's not just a read-only map. The Placemark DNA is sprinked throughout shared maps. You can check out geometry and property statistics for shared maps.

You can view properties of a feature on a shared map, and see details about its geometry.
Sharing + data

Sharing is an excellent way to share data, too - just export straight from the shared map page. All of Placemark's formats and options for exporting are available.
What will you share?
Shared maps are a feature available to anyone with a Placemark account - try sharing a map today!