Gerard,
When you say you want a policy to upload non free logo's on Commons you need to start a discussion on internal-l or a other foundation channel.
The foundation has decided that every wiki can make his own "fair use" (Don't know the right word) policy, but also decided to doesn't give that right to Commons. So even if the communety wants fair use logo's on Commons it is not possible by a Foundation resolution. So the Foundation has made it impossible for Commons to make a exeption for logo for Pikiwiki (just a example).
So instead repeating your point about logo's you could direct it to the right people.
Huib