Except for the tick mark in the view menu and the contextual menu.
Yes, they're there, but fairly non-obvious. You have to go looking for them.
The unanswered question, of course, is how many users have large numbers of excluded objects in the project window? I never have any - I add to the project only the things that I want to have in the album. The only time I exclude things is when I'm testing stuff.
Jeff, this is a major issue of David and you. Things you don't use or do are (nearly) non-existing. But users have reasons to do things they like, and they think that they are right. Believe my, I have seen so many things my users do I never had dreamed of, but I can't say to them, hey, what you are doing is „wrong“. No, I have to deal with it.
Regarding excluded objects: Your approach—and presumably that of many other users (judging by the hundreds of posts I’ve read here in the forum)—is exactly as you described: you take 100 photos, pick out 10, and put just those into an album. That way, of course, you don't have to worry about excluding any images. I understand the concept, but I personally think it is completely wrong.
You end up with duplicates of those 10 photos: the originals and the 10 inside the album. You might argue that storage space doesn't matter—and I honestly don't care about storage space—but the real issue is what happens when I edit an original photo: I would have to copy it into the album again for the change to show up there. That is a completely absurd concept. I’m sorry to put it so bluntly.
There is a valid reason for having an option to exclude items, but the implementation simply wasn't thought through to the end. You can see this in the fact that the setting to hide excluded images isn't remembered when you close JA.
Please, everyone, don't get me wrong here. My criticism might be a bit emotional at times, but that doesn't change the fact that JA is a fantastic product!