By far, this is the best explanation I've come across yet as to how/where Tommy came up with the idea (and technique) for creating his Horcruxes.
It's interesting to see how Harry has managed--just by being Harry--to get into the good graces of these powerful people. There's a very affirming message there somewhere....
I hope that, if the story ends in the graveyard after the TriWiz, that Harry waits until AFTER the Death Munchers are there to blow Tommy Boy to hell and gone with the 'last ditch' spell. Okay, mainly I want him to wait just to make Lucius crap his pants, but still....
Author's response
While Lucius didn't, plenty of others will