"I think people will continue to theorize about the characters even at the end of book seven because some people are very interested in certain characters whose past lives are not germane to the plot, they’re not central to the story, so there is big leeway there still for fanfiction ..."
-- J.K. Rowling (TLC)
The Leaky Cauldron and MuggleNet interview Joanne Kathleen Rowling (Anelli, Melissa and Emerson Spartz. “The Leaky Cauldron and Mugglenet interview Joanne Kathleen Rowling,”The Leaky Cauldron, 16 July 2005): Part 1 – Part 2 – Part 3
The Leaky Cauldron interview