I got the 64 GB iPad on launch day and bought the Incase Convertible Book Jacket 3 days later. I did not have a scratch when I put it in the case. It stayed in the case and on April 11th I noticed a scratch near the home button. I went to the Apple store to return the case and was told the screen won't scratch. When I showed the scratched screen to the sales person he was very surprised and got me in front of a genius. They were quick to replace my iPad and I returned the book jacket. (I am not blaming that case for the scratch, but rather was concerned about the durability of the cover that flips over to act as a stand.)
I put the new iPad in a Belkin Vue and also purchased an Incase Travel Kit.
I am very pleased with the customer service provided at the Apple Store (even thought I purchased the iPad at Best Buy). Also, very impressed with the Vue and Travel kit.
I was completely opposed to using a screen protector, but now have an anti-glare film on the screen.