As far as I know, a new Hub would have to go through the approval of the new Hubpages Hub hopper to get to the list in Hubpages topics (categories). Until then the Hub would be "pending" in status. If it does make it to the topic pages, it would be "featured".
This may ensure quality hubs, though I have a couple of misgivings with this kind of setup, especially with new hubs not appearing even in the "more" tab (beside hot, best and latest) — let readers choose, that would be my point.
It's a lot worse in the other online writing site I know, though, where your published articles, when labeled "work in progress," doesn't appear even in your own author's page.