I apologize if this has been posted before but I don't remember seeing anything and the search function doesn't pull anything up.
Bing.com has a maps section with aerial view from all over the world. They have an option for the "Bird's Eye View" which offers a really unique aerial perspective. I've found this to be a great tool in studying golf courses and is far, far better than the goodle maps aerial views. If offers a far clearer, more detailed view than any aerial I've ever seen. It also gives you the option to adjust the angle of view so you can see the course from all angles.
Hopefully someone can post some screen shots of courses in this view to show just how good the picture is.