Yesterday, Yahoo JP's article contained a statement from Konami at TGS 2008 that they were considering porting MGS4 to Xbox 360. Today, that same article has been edited and no longer contains any mention of MGS4 at all.
In its place, Konami states that in the future they will pursue a multiplatform strategy.
"While utilizing the feature of each platform, in the future and it does multi-platform development", ([konami] Public Relations Dept. room monitor Nakazima Chiaki the person) with we have done, say it may that the same company multiple it develops the plural powerful brands and by the fact that balance well it sells, it is arranging the body which aims toward the achievement enlargement which is stabilized.