This is either the worst or the best time for this suggestion, since you're doing so many changes right now!
Have you considered reducing/combining the less-used forums like was suggested in a previous thread? Basing it on traffic vs the book chapters seems to make sense now.
You've probably noticed the "rebellion" going on, where people post in the lounge even though they know the topic belongs elsewhere. They just want someone to read and respond! I know that isn't the best online behavior but it's tempting...
The thing that made me kind of sad was that this one mom posted a heartfelt plea for help in the Toddler 411 Lounge and nobody responded for over a week! Her post was really stressed and sad and she probably gave up on the board because nobody noticed her post.