Deb, I love that idea!
Becky, basically, a NOID is just a plant that you don't know the name of, as in you haven't identified what it's registered name is. This can be said for every kind of plant, not just daylilies. If you have an iris, but don't know which iris it is, you would call it a NOID iris. Same for clematis, tulips, lilacs, or whatever. If they have a registered name, or "official" name, but you don't know what it is, you would refer to it as a NOID (No ID) plant.
A daylily seedling is totally different, since it hasn't yet been registered. It's one of a kind. Without registering it, it should always be referred to as a seedling, regardless of its age, so that others know that it hasn't been registered. If it was a registered plant, and you lost the name, it would be a NOID daylily.
Does that make sense?