A couple interesting tidbits regarding Peace Walker landed in this week's issue of Famitsu.
One chats about how the game incorporates Yamaha's Vocaloid software, allowing for in-game weapons that have AI installed in them to sing and scream at you while attacking.
The other is Hideo Kojima revealing that the 2D illustrated demo scenes you'll see in-game are also interactive.
"During these demos, there are parts that the player can work by himself, moving the camera and looking around," he said. "That was [art director Yoji] Shinkawa's idea. There's no huge penalty if you ignore it, but it works its way into assorted aspects into the game."
Citing an example, Shinkawa popped in explaining that "if you zoom in on the scene where you first meet Paz, you can see the uniform she has on under her coat, and then what's under that."
As far as the future of the series is concerned, Kojima dons his mad scientist hat again and said that someday, portable games will not be bound by hardware capabilities.
"In the near future, though, we'll have an era where you can just connect to a host computer with your portable and play all sorts of great games," he said. "I'd like to experiment a little and see what kind of Metal Gear game would be best for that kind of environment."