-The paper will still be smooth, fountain pen friendly, and made by Clairefontaine in France.
The overall size, dimensions, page count, binding (ability to lay flat), cover and rulings will all remain the same. I'm unsure about the small lined rulings will be in the new paper though (currently it's 5mm).
-The Habanas sold in the US and Canada will be made in the Quo Vadis plant in Hamburg, NY; the rest of the world's Habanas will be made in France.
-Even though there will be two different plants making Habanas for the world, they will all be identical (unlike in previous years where the 'US version' was different than all the others).
-There will be no more blue or taupe lined Habanas; the lined Habana color lineup will be identical to the current blank Habanas in black, red, anis green, and raspberry.
-All of the Habanas, blank and ruled, large and small, will have the same 85g off-white paper.
-The prices will remain as they are for 2011, $20 list for the large, $15 list for the small. From what I understand, this was a factor in deciding to change the paper.
-The Habana was actually originally intended to be off-white paper 2 years ago. A mix-up sent the wrong paper to Hamburg when the Habanas first were produced, so they went with white paper. It has been slated to be changed since last year, though it was never highly publicized.