I want to be optimistic that the new Mac minis and the iBooks will come out soon, but how often in the last few weeks have the shipping times increased (except for iPods) only to have nothing happen? I'm actually starting to loose hope that they will come out sometime soon, or at least early enough as not to be too new by the time that the Mactel comes. So, my guess is that this is just a delay in shipping, as we have seen before.
Of course, the last time I said something similar to this was when the iPod shipping time went up, but the next day, there they were...