Following up on this previous post. Here are some more links to find those ocassional vector logos you need urgently:
http://www.brandsoftheworld.com
http://www.Logotypes.ru
http://www.logotypes.lv
http://www.lalogotheque.com
http://www.fcklogo.com.ar
http://www.portalpublicitario.com/logos/Logos.asp
http://www.visual.gi/logoteca
http://www.designclub.com.ua/logos
http://www.hqfl.dk (football logos)
If you know more please add!