Evan Wells gave us a lot of info on Uncharted 2 and explained some of the changes to come.
-Beta was a great success
-New features, maps, boosters and new game modes will be added to the final product.
-Some trophies will be multiplayer based but non that will takes days of grinding to achieve
-No official release date [...]
"Uncharted 2: New Info From Live Chat With Naughty Dog" - 01.07.09