A wonderful chapter and I love the way you're writing Neville. I do hope he'll manage to continue to "mentor", for the time being, Harry and Hermione without exposing himself. I believe that adjucation process was used in Seel'vor's "Harry Potter and the Quantum Leap", http://www.fanfiction.net/s/3951749/1/ , though I'm sure there are likely other uses.
Well, it's funny that you mention Neville exposing himself (and not like that you pervs! GRIN) I am still working on Chapter 6, and, it turns out that Hermione and Harry noticed quite a few things when Neville didn't think they were watching, and are asking him about it!
I'll have the chapter up before I go to bed tonight, so you can see what I am talking about.
Thanks for the link, I've added it to my authors notes, so proper credit can be given.