I put together a KML file of Survivor POI's based off Dan Bollinger's maps. The overlays of all 11 maps are included as well as a few points from All-Stars. Download it here.
Includes POIs from all twelve seasons, the most detailed is Africa, there are points for virtually every immunity and reward challenge this is, of course, based off the amount or lack of data contained on each of Dan's maps.
In terms of the imagery provided by google maps:

• Borneo — it's OK
• Outback — Pretty good
• Africa — eh, not so good
• Marquesas — HORRIBLE — almost as bad as the season was
• Thailand — Very good but too much cloud cover
• Amazon — Very good, you can even see the Ariaus Towers
• Pearl Islands — Good, except it's very cloudy and there is a large very blurry patch just below the "survivor" area which includes the location for the new exile island
• Vanuatu — Very good
• Palau — as bad as Marquesas
• Guatemala — it's OK

This is far from done. And any contributions are helpful. That said, contributions of actual KML,KMZ files or XML fragments from Google Earth are great and can be added as a comment or emailed to adam@gotlinux.us.