What's funny? The developer himself posted in this thread yesterday "Hopefully the idle hands update will be out tonight and I am working on the following update right now."
I can tell you personally that I posted an update to
100sounds 6 days ago, and it hasn't been approved yet, and the only change was the text on the (i) info page! Apple sent an email saying that the review would take extra time, but no details. I asked for a little more info and got the same message. Frankly, it's amazing the developers have been able to update the app as frequently as they have, with new features.