Registration for the closed beta of Metal Gear Online has begun in Japan, unfortunately, you need to be able to read Japanese if you want to register. The beta will be limited to 3000 users, who will be chosen at random from the list of registered users, and will commence from August 20th to 3rd September. If you would like to register for the beta, you must do so before August 6th. Screenshots of Metal Gear Online can be found below.
Hi-Res Screen Shots:
The beta period seems really short, especially since the release date of the game has not been announced yet. A closed beta for North America or Europe has not been announced either, but hopefully more news will be available soon.