Lubriderm, it's been a theory for quite some time that RAB is Sirius' brother Remulus, who was a close Death Eater to Voldemort until he turned traitor. The last what you call it (crucix?) is in the Black house. The kids find it while cleaning out the house in OotP.
Saw the movie on Friday and I thought it was great!! Cried my eyes out when Cedric died, just like when I read the book. Some old dude was sitting next to me and he was sniffling like crazy too.
Couple complaints I had that have to be excused for lack of time:
1. I thought the changing of the World Cup incident was terrible. It seemed 10x more terrifying than in the book and I didn't really find it necessary to up the violence there. I mean, a screaming terrified mob in a huge fire?
2. I didn't like that they didn't explain the spell at the end with Harry and Voldemort having similar wands.
3. I'd been looking forward to the questioning of Barty Jr. after the Tournament, but instead Snape pours an entire bottle of Veritaserum down his throat and they ask him like 3 questions. And then they don't show him dying!!
Other than that though, I was pretty happy to watch a version with no annoying *** House Elves. I'm glad they took out Hermione's campaign, whatever it was called.