loose ends to tie up in HP 7 - the locket

[Marianne S.]

No: HPFGUIDX 136206

Brothergib wrote: Kreacher probably has the locket. At some point
 someone will rememberthe locket (probably Hermione) and then 
Harry will ask Kreacher whereit is. He may even tell Harry how he 
& Regulus actually got the locket.

Rivkahanki wrote: They have seen and touched the Locket Horcrux. 
It was in the cabinetin 12 Grimmauld Pl - They were cleaning - 
"a heavy locket that noneof them could open" JKR never says if 
Sirius threw it away. Kreacher could have it - or Mundungus.

now Marianne S:
I find both of these statements plausible. I wonder then, does Kreacher have his 
little Black Family Shrine-like collection with him at Hogwarts? Or, if Mundungus 
got to it, was he able to sell it (since people _might_ not want to buy a 
locket that doesn't open) or could Aberforth Dumbledore possibly have it
(because wasn't the barman from the Hogs Head the person Harry saw 
Mundungus with, along with the Black family goblets)? How is it that Harry, Ron,
and Hermione don't know his identity, anyway? 

Marianne S