[PCheese]

It’s probably nicer to schedule this with iCal instead of crontab. Create a new iCal event, and add an alert for that event that runs your script. You can easily and visually configure the event to repeat only on weekdays, and the best part is that you can simply delete or modify single instances of the recurring event to deal with exceptions like holidays.

[vishaldpatel]

Ah cool - I'll add the iCal version to the post as well, thanks! =).