In the latest HideChan podcast, producer Hideo Kojima, designer Shuyo Murata and some other members of Kojima Productions did a reading of the Metal Gear Solid: Peace Walker script.  The script is in it's final phases of completion, according to Kojima, saying that the staff read through is the last step before it's handed off to the voice actors for recording.  Kojima also goes on to say that the majority of the voice actors have yet to be decided on, and urges fans to write in with suggestions.  He does reveal that the actor for Snake has already been decided upon, though he doesn't give a name.

Of course, in usual Kojima fashion, certain parts of the reading have been bleeped out and censored, not too unlike the interview Famitsu posted just days before the game was revealed at E3.  Check it out here, courtesy the HideChan blog.  The script reading starts around 15 minutes in, and of course, is in full Japanese(sorry to get the hopes of non-Nihongo speakers).

MGS: Peace Walker is due out sometime next year, exclusively for the PSP.