re: Harry Carpenter- I think that Harry Carpenter and Harry Dresden have some really important similarities between them, possibly having something to do with being Outsider-bane.
( And no, I'm not talking about the name )
I think we should really be thinking about little Harry now, especially since a bad guy has already made a play for him. I'm not saying that Nicodemus 'knows' about Harry C. (if there is, in fact, anything to know), but the fact remains that, from a plot standpoint, this little kid was nearly put in to play six books ago.
Little Harry isn't going to be so little for very long.