The Google Earth Blog is reporting new imagery arriving in Google Earth. The extent of the update isn’t yet known, but people have found new images in Argentina, Poland, Germany, Chile, France and the USA.
As with most updates, this one is live in Google Earth but not in Google Maps. This means you can compare the two to decide if a given location is fresh or not.
Keep an eye on the GEB post for more updates as people discover other areas with new imagery.