I have a few distribution lists in public folders on Exchange 2003.
Some of the contacts appear with a business card and a face as the icon. Others appear with what appears to be a business card, and no face.
On the ones with a "face", I can add details like "full name, Company, job title, etc".
On other contacts in the same DL (without the face), I can only edit their "email properties."
I'd love to attach screenshots...but that doesn't seem to be working.