For a $400 annual subscription fee, Google Earth Pro is a business-oriented upgrade to Google Earth that has more features than the Plus version. The Pro version includes add-on software such as:
GIS data importer.
Advanced printing modules.
These used to cost extra, in addition to the $400 fee, but have recently been included in the package. As of January 2008 Google Earth Pro is being updated to have over 400 extra features, the version's cost has been announced to be $1030 USD.