It is amazing what you can do using only CSS these days:
The code required is heavier (page-weight wise) than a simple binary image, but this is fun none-the-less. More examples here: The Simpsons in CSS
I have been writing about web technology and software development since 2001. I am the developer of the Alpha Framework for PHP, and the Five.Today personal productivity app. I love open source, technology, and economics.