damn it cube, I was already typing the same answer.... Grr
Well I guess I will give some more insight then
if you are in jaguar, you might want to check this out, it lets you change different icons to a different sizes, on the same desktop, IconSizeEnabler (http://www.pixture.com/macosx.php)
and if you want to play with disc usage, check out GeekTool (http://www.macupdate.com/info.php/id/10404)
Zee