From high res pictures on joystiq it does not look like the HDD is removable:
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-01.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-02.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-03.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-04.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-05.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-06.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-07.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-08.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-09.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-10.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-11.jpg
rp2000
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-01.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-02.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-03.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-04.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-05.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-06.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-07.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-08.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-09.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-10.jpg
http://www.blogcdn.com/www.joystiq.com/media/2009/08/ps3-slim-11.jpg
rp2000