Funny thing about this is that I recently created an ad for a friend that
will be published by a national magasine. They specifically say "Microsoft
Publisher (.PUB) files cannot be accepted." And in bold text at that. They
require a CMYK and maybe that's why they didn't want Publisher files. I used
Photoshop Elements, which does not support CMYK builds, and then ran it thro
Acrobat and did it there.
Maybe they will change when Pub 2003 becomes more widely used.