Ah, Kimarhi of Gamefaqs translated it. Here was the post:
OK, I looked through it (I admit somewhat quickly).
As a note, it was somewhat hard for me to follow because parts of the interview are excised.
Sakurai talks about how they got various composers. Basically the entire thing is about music actually. He seems to say they'll be using an arranged version of the "Theme of Love" (Ai no Teema) from Metal Gear Solid 4. Someone (Kojima I assume?) mentions a Metal Gear piece of music called "Calling to the Night" that's popular in the series (I'm not a Metal Gear buff <<). He says either it seems like they will, or he's heard that they will, (not sure how to interpret it) use it in Smash Brothers. Sakurai affirms that he'll be updating "day by day, little by little." For his final word, he says to people to please anticipate the game.
Nothing really interesting besides the Metal Gear music, unless I misread / missed something.
So we got some more confirmed info when it comes to music. Im interested in hearing these pieces...