1) The twins' birthday is April 1 - so they were too young in GoF.
2) I think there was a one on hp-lexicon.org.
3) No, it had to have been Dumbledore. He never directly lies to Harry. But I'm pretty sure we'll learn more about it in HBP.
4) Any witch/wizard can use any wand, but each witch/wizard responds best to his or her own want if the wand 'chose' them.
5) No idea.
6) I think he did have some feelings for her - but he wasn't supposed to, as she was muggle-born. That's why he was bitter. But no one can say for sure except JKR.
7) Yes, Snape was a Slytherin, as he is the head of Slytherin house. And I'm quite sure that Peter, Remus, Sirius and James were all Gryffindor's. It would have been hard for them to become so close otherwise. And, most people are more then one house. Hermione is Gryffclaw, Harry Gryfferin, etc... The Houses are not simple at all. There is even a theroy that Voldemort wasn't Slytherin.
8) Quite possibly. GOF gave us so much to work with; but left so many questions.
9) No, clearly Voldemort is Tom - his interactions with Dumbledore show that. And, 1000 years ago Slytherin's feelings were understandable, and so much was at risk. However, purebloodedness doesn't when you're sorted. It's true that Slytherins do hold those ideals - but only the ones we know of. Basically, now, the hat looks for the traits over heritage now.
10) There have been a number of theorys, I imagine. And we'll probably learn it in the next two books.
Hope this helps some...
2) I think there was a one on hp-lexicon.org.
3) No, it had to have been Dumbledore. He never directly lies to Harry. But I'm pretty sure we'll learn more about it in HBP.
4) Any witch/wizard can use any wand, but each witch/wizard responds best to his or her own want if the wand 'chose' them.
5) No idea.
6) I think he did have some feelings for her - but he wasn't supposed to, as she was muggle-born. That's why he was bitter. But no one can say for sure except JKR.
7) Yes, Snape was a Slytherin, as he is the head of Slytherin house. And I'm quite sure that Peter, Remus, Sirius and James were all Gryffindor's. It would have been hard for them to become so close otherwise. And, most people are more then one house. Hermione is Gryffclaw, Harry Gryfferin, etc... The Houses are not simple at all. There is even a theroy that Voldemort wasn't Slytherin.
8) Quite possibly. GOF gave us so much to work with; but left so many questions.
9) No, clearly Voldemort is Tom - his interactions with Dumbledore show that. And, 1000 years ago Slytherin's feelings were understandable, and so much was at risk. However, purebloodedness doesn't when you're sorted. It's true that Slytherins do hold those ideals - but only the ones we know of. Basically, now, the hat looks for the traits over heritage now.
10) There have been a number of theorys, I imagine. And we'll probably learn it in the next two books.