If you are keen, I recommend visiting NarniaWeb every day as the news and photos are flying in thick and fast.
Casting is announced for Coriakin, Pug, Gumpas, Drinian, Rynelf, Rhince,... and the chief Duffer.
The 3-day shoot at the Narrowhaven set is over, and because it's all out in the open, millions of photos have been taken by people who wander in from nearby (there ARE fences to keep them right off) or even hire boats and go out on the water to take photos!) Watching the DT come together has been interesting and has kept discussions red-hot.
I can also mention that because Disney is no longer connected with the film, I am more confident about the story and themes as being closer to the book.