This is by far the largest Lego project I have ever attempted. The mosaic is about 8 feet long, and is made of over 25,000 Lego elements.
I created a time-lapse movie of the mosaic being built which can be seen here.
The image was taken from wikipedia commons, and is licensed under the Creative Commons. The original image can be found here.
Some more shots of the project:
The mosaic will be on display at Brickworld 2008 so if you're in the area you should definitely go.