The Google Earth extension supports version of AutoCAD as far back as 2007. For this update, only the 2012 compatible technology preview was updated. This is even different from the 2012 update the team made in June of this year. In fact, this update is a complete rewrite that interfaces to Google Earth using a new Java Application Program Interface (API). The former version used the Microsoft COM API (// more), so we'd really like your feedback on this new version at firstname.lastname@example.org or the AutoCAD 2012 discussion forum.
As part of the rewrite, the extension now supports additional flavors of AutoCAD:
•AutoCAD Architecture 2012
•AutoCAD Map 3D 2012
•AutoCAD MEP 2012
•AutoCAD Mechanical 2012
•AutoCAD Plant 3D 2012
As before the list of capabilities includes:
•Import a Google Earth image into AutoCAD
•Publish your 3D model to Google Earth
•Drape a Google Earth image onto a 3D mesh in AutoCAD
•Attach time span information to your model
but color is now supported. The former version was black and white. Color was the number 1 request on the survey feedback. The user interface has also been updated to let you work with Google Earth while remaining in AutoCAD.
The read me for this update notes
•AutoCAD Civil 3D 2012 is not supported.
•the Google Earth Extension may encounter problems when used with a proxy-server that requires authentication (i.e., user name and password).
You can get more detail on all of this from the getting started page on the Autodesk Labs site.