Got this from IPB forums:
Seems the makers hid some secret material on the matrix site. Here's howto access it.
- Goto http://www.matrixmovie.com/
- Click 'Enter High Bandwidth'
- Click the yellow circle in the upper right corner
- Click the square next to 'Low bandwidth' twice.
- Open 'Access panel 3'
These are the codes you can eneter to access the material
11011011 3d view nebuchadnezzar
10110110 Bonus clip Stunt coordinator
00011000 Bonus clip Concept Illustrator
10000001 Previous matrix website
11101001 Trinity concept art
11010100 Animatrix Desktop Art
01101111 Hexadecimal menu.