This past Sunday a documentary titled J.K. Rowling - A Year in the Life, which chronicled the last year in which the Harry Potter authored the last book in the series Deathly Hallows, aired in the UK. Video of the documentary is now online for those unable to view it in the UK.
UPDATE: JK has updated her web site with a sketch of the Weasley family tree in the 'Room of Requirement.'
Harry Potter: It All Ends
Harry Potter cast and crew.
IT ALL ENDS!
J.K. Rowling, Dan Radcliffe, Emma Watson and Rupert Grint Give Emotional Goodbye to 'Potter' Series