Our good friends at GameBanshee have posted a preview based on their own hands-on time with the game. Here's an extract
“Killing the Caesar's Legion soldiers brought me some definite satisfaction, but it quickly knocked my reputation with the faction down to "shunned" and, soon after, "hated". When there was nothing left but severed heads and dismembered eyeballs, I had the opportunity to search the bodies and various tents that made up the camp. What I found most interesting was not the ammunition and other loot that could be had, but the notes that I found and added to my Pip-Boy. Some notes were letters written to loved ones, while others were journal entries that NCR members had been writing just before being surrounded and subsequently killed by the Caesar's Legion. Avellone explained that the notes in Fallout: New Vegas are intended mostly for flavor, though there will obviously be some that yield useful information (such as codes to locked doors). As a fan of little lore-inducing elements like this, it was a welcome sight.”
