Ehr, been keeping track of it, but can't recall anything particular about voice-acting. Here's a rundown of the headlines on Cry2 (first 3 have videos):
Making Manhattan Chowder with Crysis 2
Crysis 2 Trailer: Big Apple, Nice Buns
Crysis 2 Preview: Two Ways To Save New York, New York
Crysis 2 Eyes-On Impressions: Rumble in the Asphalt Jungle
Crysis 2 Goes 3D On 3 Platforms
Crysis 2 Beta Keys Go First to Site Registrants
Don't Hate Crysis 2 Because It's Beautiful
"Brutality" Of Console Gamers Sharpened Crysis 2, Didn't Dumb It Down
Something to note about the graphics; Crytek claims to have been focusing on scalability for the new engine version. It's possible the game won't actually look worse on PC, but instead requires a little less power than expected to still look decent, while running it maxed out might again be impossible on anything but the latest hardware.
All the trailers so far, as far as I know, are run on the 360. It's arguably the weakest platform (graphically) for Cry2 to be released on.