“Soundtrack apparently has a ‘Diva’ option which is entirely composed of Hatsune Miku versions of the existing BGM”:http://jrpg.jp/news/?eid=16&nid=220.

I’d like to hear some samples!

*Slight addendum 9/18*

Looks like the site updated with a partial “list of producers for Diva mode”:http://jrpg.jp/news/?eid=16&nid=221 – namely,

“（PAwLaboratory.）、8#Prince、kiichi、sasakure.UK、そらいろくらぶ、nak-ami、whoo、baker、millstones、monaca:factory、Wonderlandica”

Not sure how they pulled this one off…