How solid are these casting announcements? I read them over at another forum with a link to some site I've never heard of. They don't seem to have been picked up by the mainstream media yet.
Anyway, they seem like interesting choices. Naomi Watts seems a bit young for Narcissa Malfoy. Watts is also a bit too old and too pretty for Merope.
Joseph Fiennes (I'm really amused by his possible casting

) seems to suggest a Tom Riddle connection. Either Tom Riddle, Sr. or young Voldemort? But then again, he's only a few years younger than his brother and he's also a bit old for Riddle, Sr. unless they're making Tom Sr. and Merope older (which would fit for Watts).
Not sure how I feel about Stuart Townsend. I can't really think of him in any of the possible roles. He seems too young for either Rufus Scrimgeour or Fenrir Greyback. Though of the two, I'd imagine he's a better fit for Greyback.
As for other dream casting....I agree that Bill Nighy MUST be in this movie. I can picture him as either Scrimgeour or Greyback (though I'd rather him play Scrimgeour).
I always envisioned someone like Kristin Scott Thomas for the role of Narcissa Malfoy.
For some reason, I always thought Jim Broadbent would make a good Ludo Bagman, but I guess he could work out as Slughorn. My personal pick for the role is Simon Callow though. Can't say he matches the psychical description, but he could easily pull Slughorn off (or at least the way I imagined him).
I kinda like the idea of Ian McShane for Fenrir Greyback.
So if anyone at Warners is reading this....
