Note: Please upgrade to beta4 as this version contains a bug that prevents the static map from rendering correctly.
The main new functionality is the ability to use this to render a regular JS-driven Google Map that falls back to the static map image should JS not be enabled. KML files can also be attached to that version of the map.
If you came here looking for a mail-sending module, try HTML Mail (which can use this module for MIME-handling) or Mime Mail (which comes with its own MIME-handling library).