The wait to try Metal Gear Solid: Peace Walker in English is almost over. Kojima Products mentioned on a podcast the were working on a translated demo. Now its dated for December 17, this Thursday.
The Demo-Ops download has four missions to play and supports ad-hoc connectivity. Basically, it’s a localized version of what Konami brought to Tokyo Game Show and you can get (in Japanese) on Japan’s PlayStation Store right now.