Why disable the floo network?  

I forget the Slughorn was probably a very powerful Wizard. He must be if he was able to alter the castle rooms. He seems so shallow one doesn't think of him a magically powerful.  

I'm looking forward to finding out what Minderva has to say.  I've read this a long time ago and remember nothing at all except that Hermione had distroyed her lab at Arglist.

I like the pairing of Draco and Luna.  Draco as the Divination Professor is also believable.  I can see Draco making a complete change of world view after what he had been through and how he had been forced to become someone he didn't really want to be. I'm a little disappointed in Hermione for not visiting Severus Snape more often, when Neville had the balls for it. It doesn't seem very much like "Hermione Gryffindor's finest" to me, but maybe she was a little more beaten down by the war and her stint at that awful company than I can appreciate. I'm sure nobody forgets their first minutes at Hogwarts but this group will have a story to tell like no one else in at least a century.