PC.IGN, GameSpot, 1UP and GameSpy have all posted their Pandora Tomorrow previews, taking a look at the new Splinter Cell game which will be released on PC and consoles next March. The articles offer an overview of the new features, and several screenshots are included as well. Here's a bit on the gameplay from GameSpot

You'll find two main modes in the game now: single-player and multiplayer. The single-player game is where you'll play Sam's new adventure. While the game's core mechanics and control are based on the original, Ubi Shanghai is implementing a number of refinements and additions to offer a tighter overall experience. You'll still control Sam in a third-person view, and you'll have access to his robust move set, which works very nicely for stealthy sneaking and killing. [...] Sam can now shift his weight to his right or left leg while performing his well-known split jump. In addition to the old favorites, you'll find Sam has new tricks up his sleeve, such as a speedy swim move that lets him slip past open areas, like doors, so that he can get to the safety of the shadows