Horcruxes.... the general status

Well, I think that the status of the 7 horcruxes of Voldemort is going to be the main storyline of the 7th book. Quite a lot about the horcruxes was known by the release of the HBP. Basically these are the horcruxes found and to-be found.

Definite Horcruxes:

Horcrux 1: Himself [voldemort]
Reason: Voldemort must keep one part of his soul within his body.
Status: Not destroyed.

Horcrux 2: The Diary.
Reason: It was confirmed in Half-Blood Prince.
Status: Destroyed by Harry in Chamber of Secrets.

Horcrux 3: Slytherin’s Ring.
Reason: It was confirmed in Half-Blood Prince.
Status: Destroyed by Dumbledore in Half-Blood Prince.

Horcrux 4: The Locket.
Reason: It was confirmed in Half-Blood Prince.
Status: Taken by R.A.B., whose intent was to destroy it, but it is not known if he was successful. Likely last seen in Grimmauld Place in Order of the Phoenix, [in the british edition, page 108].

Here ends our list of confirmed Horcruxes and leaves us with three more spots to fill.

Horcrux 5: Something from Hufflepuff. [most probably the cup]
Reason: Tom Riddle murdered Hepzibah Smith and stole the cup of Hufflepuff, one of her most prized possesions.
Status: Object unknown. Not known to be destroyed.

Horcrux 6: Something from Ravenclaw or Gryffindor.
Reason: Dumbledore believed it to be one of the two Hogwarts founder’s possessions.
Status: Object unknown. Not known to be destroyed.

Horcrux 7: Unknown [Dumbledore believed it to be Nagini, the snake Tom was awfully fond of]
Reason: Nagini was a snake which, as Dumbledore said, Tom had a power control over/passion for it. Dumbledore assumed that Tom, even for a Parselmouth, had an unusual power over Nagini. [Half-Blood Prince]
Status: Object unknown. Not known to be destroyed.

Information from Veritaserum: Let the Truth be Known, with changes by urs truly Rita Skeeter, lol.

[Edit]: Confirmed: Last word of the Seventh book IS "scar" [/Edit]