I just came into the possession of a Call of the Conclave Friday Night Magic Edition, but I cannot properly list it because the edition is not listed on the site. It looks quite a bit different from the regular edition and is worth more.

The issue is that all of the version information is pulled from the official Gatherer site, which does not list these types of versions/promos. At this time I don't know of any plans to add these additional editions.

I usually "mark" it as foil and promo, even though the price doesn't change.

Same here, but I still have to field questions regarding edition when potential traders ask. It just gets annoying.