Has anyone just asked for permission? I mean, "permission has been given to use the official logo on clothing (shirts, hats, etc) as long as they are made by a Debian developer and not sold for profit." [1], so for something like Squeeze artwork, seems probably they'd give permission. If not for Squeeze, then maybe something to look into for Wheezy. [1] http://www.debian.org/logos/index.en.html#official-use