Are you exclusively looking for free or has your training budget got deep
pockets? Reason I ask is that Thompson NetG is still offering Office 2000
on-line courses, including breakout of Excel 2000. If I'm not mistaken, they
offer Excel training at 2 or 3 levels: beginner, intermediate and advanced.
Maybe only beginner and advanced. But they are NOT cheap.
Keep an eye out for Excel 2003 courses/tutorials also. For most practical
purposes there wasn't much change between 2000, 2002 (XP) and 2003 and a
course for 2003 could provide good training. Obviously you want to stay away
from 2007 courses, since the user interface underwent such a drastic change.