There is a new version of Google Earth out bringing the popular program up to Beta 4. There is a Windows version, Linux version and a version for all you Mac users too.

We've reorganized the data layers to make it easier to find layers and turn them on and off. The nav panel at the bottom of the screen is gone, freeing up more real estate for actual imagery. The nav panel tools are still accessible, though; the nav controllers are now in the upper right and the tools (measure, print, email) are in the new tools bar along the top.