I also found this the other day and wanted to share it with you guys as well.
No one will ever achieve what photoshop can do. It's physically not possible to be that smooth and that thin.
Here's some avatars you may know discussing an image at Thinspiration:
http://www.flickr.com/photos/misseil...n/pool-thinspo http://www.flickr.com/photos/misseil...n/pool-thinspo