I think I know what one of the horcruxes is.

[Constance Vigilance]

No: HPFGUIDX 148219

The Gryffindor horcrux. What could it be? JKR has said it is not the 
hat. It could be the sword. It could be something we haven't seen 
yet. But here is my guess - I think it is Godric's Hollow itself. I 
think Voldy intended to build a horcrux into the Godric's ancestral 
house and intended to populate it with Harry's death. I think he got 
through the preparations and then got, um, interrupted, resulting in 
the destruction of the broken horcrux.

This would answer a question the readers have had since the first 
book - why did the house collapse under the failed killing curse? We 
have seen the results of two horcruxes which were destroyed. The 
diary ruptured and bled ink. The ring cracked. When a horcrux is 
destroyed, it loses its structure. The collapsed house sounds like 
it has had something similar happen, yes?

And I think creating a horcrux in Griffindor's house would appeal to 
Voldy's sense of irony. He, as the last member of the House of 
Slytherin, maintaining immortality with the aid of the house of 
Gryffindor. Also, the house would likely to be held in a degree of 
reverence by Voldy's enemies. They would be likely to want to 
protect this place at all costs.

Something has been bothering me about the horcrux count, though.

If Voldy was going to make his 6th and final horcrux with the 
killing of Harry, and that failed, then there should be two Voldy 
bits floating around, no? The bit that didn't become the horcrux and 
the one he intended to keep in his body. I'm thinking that now that 
he is corporeal again, he could have made horcruxes to replace the 
lost ones, if he knows they are lost. But in his first pass, I'm 
thinking there must have been one less horcrux than Dumbledore 
thinks. Does anyone agree?

CV