Lenna is the lorem ipsum for images (<a href="http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png" rel="nofollow">http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png</a>). For a bit of history, <a href="http://en.wikipedia.org/wiki/Lenna" rel="nofollow">http://en.wikipedia.org/wiki/Lenna</a>