Google has enhanced the Street View experience in Google Earth 6. To enter new Street View, just grab the Pegman from the navigation controls, and drop him on a blue highlighted road. You can also enter Street View by zooming in close to the ground. And of course, you can exit at any time by clicking on the "Exit" button.
"Using panoramic images and 3D depth data from Street View vehicles, we built 3D street scenes and integrated them into Earth. As you move along the street, we blend together different panoramas to create the illusion of one continuous 3D scene. To help you navigate, we've also added new controls for ground-level viewing: use scroll-wheel to move forward and backward, double-click to move towards a point, and click-and-drag to look around. Using double-click and scroll wheel features will navigate you to clearest view. Also, keyboard arrows also enable you move freely through the environment but with some distortion.
Because Street View is now fully integrated into Earth, your place in Street View matches your location in 3D. This means that you can easily see 3D buildings, terrain, and now 3D trees by toggling from Street View to ground-level view -- simply click on the building icon in the navigation controls," explains Google.