JKR's Edinburgh Festival Q&A is on her website now (under news) (HBP)

[lilypo2007]

No: HPFGUIDX 110193

Julie <juli17 at a...> wrote:
> The question of whether V/TR has ever loved anyone 
> leads us rather neatly to the Half Blood Prince, sez JKR. But does 
> this mean the half blood prince is in some way directly connected to 
> V/TR, or does this mean the half blood prince, like V/TR, has never 
> loved anyone (or, likely, been loved by anyone)? <snip>
 

I had a different interpretation of what JKR was meaning with the
words Half Blood Prince. I think she was not meaning the character,
but simply book six, the plot of book six. Probably we'll know more
about Voldemort and his lack of love in book six.

"lilypo2007"