In a very interesting WMMNA article detailing one of Eno's recent lectures, it is noted that Will Wright and co. "wanted sound that is just as procedural as the game itself," preferring to avoid any looping tunes that change with each level. Eno is already working on a program called "The Shuffer," which will use sampled bits and pieces to craft Spore's soundtrack, without ever creating "the same composition twice within a lifetime."
Meanwhile, in an alternate universe, Kenji Eno actually does get the job -- too bad the other Spore is a survival-horror game set in an underwater laboratory.
[Via Eurogamer]