Update, 2007: You may also be interested in my OMG EXCLUSIVE DEATHLY HALLOWS SPOILERS!!! JINKIES!!!
Stop reading if you haven’t finished Half-Blood Prince! STOP!
So now that Harry knows that Tom Riddle is (was?) James Potter, how will Harry deal with the fact that Voldemort is his father? (That is, after that agonized yell when Voldemort cut off his wand-wielding hand?) Will he have the nerve to face Voldemort, stand his ground, and redeem his father, or will he give in to the dark side… of his personality?
The hand issue means Harry will have to master wandless spellcasting, unless he can use his left hand, or does the infirmary grow back hands? Plus, he’ll have to make a new wand.
Hermione didn’t take the news that she is Harry’s long-lost sister too well, either — that means Voldermort is her father too. That knowledge quite nicely handles the question of who gets to be Hermione’s lover, at least: Ron, as soon as he’s unfrozen from the Carbonitus curse — if Hagrid and Neville are able to rescue him from Peter Pettigrew’s clutches.
This is a dark time for the wizarding world. Now Voldemort has really struck back.