Tactile bridge crossing and weapon selection included in Snake's 3D adventure.
http://www.nintendoworldreport.com/news/26473
Gyroscopic control and touch screen are options in Metal Gear Solid 3D, according to Twitter postsby Hideo Kojima.
The series creator announced that he just completed playing the E3 demo for MGS3D, and that he had used the gyro controls on the 3DS unit to cross a rope bridge safely.
Also revealed was that the player will be able to select Snake's weapons via the touch screen.
He included an image of the game being played on the 3DS that shows both screens. The bottom screen appears to feature a map overlaid with inventory items, which are presumably the icons used to select Snake's equipment. The top screen shows Snake sneaking through high grass.
Kojima will not be at E3 next week. Instead MGS3D's producer, Yoshikazu Matsuhana will be present to promote the title.