Batch desaturate on command line:

for img in `ls *.gif`;
do convert -fx G $img $img;
done;

Where G means grayscale (greyscale)

Last found on Tabadley some of this is what keeps me running a Windows partition.

1. OneNote
2. Fireworks
3. Freehand
4. Flash
5. MindManager Pro
6. Quicktime
7. Swish