If you are a fan of the extraordinarily useful Google Earth program, you'll be happy to know that Google Earth Beta 4 has now been released. For all three major platforms (Windows, Linux and Mac) you can download the client for free and give it a go. It is Beta software, as most Google software tends to be and remain for long periods of time, so bugs may surface of course. 3D texture support for buildings has been implemented now, making it look more realistic, among other things. If you're interested, you can get it from Google's site.