This morning, Amazon began to list the upcoming Metal Gear Solid Rising for the Xbox 360 for $59.99.  No official release date is given.

Kojima officially announced the game at Microsoft's E3 2009 press conference, after running various countdowns for the announcement on a Konami website. The game will be released on the Xbox 360, PlayStation 3, and PC and will star Raiden. 

Both Kojima and Kenichiro Imaizumi will be producing the game. Kojima stated that he became involved with Rising because "it's a completely different kind of action than what has appeared in the series so far" and also stated that he will be more involved in the development of the game than a normal video game producer would be.

Check it out:  Amazon - Metal Gear Solid Rising