SSAO stands for Screen Space Ambient Occlusion. It gives objects its own shading basically, producing puesdo shadows on the object. Yes SSAO is one of those high impact shaders but the results are pretty sweet. Look at all the morrowind pics of SSAO, they're pretty ballin'
Yeah, here are a few of mine:
http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot152.jpg/http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot151.jpg
http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot144.jpg/http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot143.jpg
http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot163.jpg/http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot162.jpg
http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot160.jpg/http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot159.jpg
http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot142.jpg/http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot141.jpg
http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot22-1.jpg/http://i18.photobucket.com/albums/b120/iamerik/MW%20and%20Oblivion/MGEScreenshot21-1.jpg