Quickly and easily add links to your blog posts, which when clicked, starts up the Google Earth program at the specified location (lat/long).
You will need to register your wordpress domain (e.g myblog.com) to signup for the Google Maps API. You can still use the plugin without it by manually typing in the latitude/longitude but it is much easier to select from the map.
Yes PlaceSurf should accept both formats without a problem.
Yes as long as Google Earth is installed on the device, PlaceSurf links will work.