This article is from the R.E.M. FAQ, by Ron Henry (firstname.lastname@example.org) with numerous contributions by others.
The Mike Mills in Butter 08 is not Michael Edward Mills from R.E.M., but a
graphic artist who has done work with bands like Smashing Pumpkins and They
Might Be Giants. According to rec.music.rem reader <sujan> he does not
remotely look like the Mike Mills in R.E.M., for whatever that's
worth. Note that Butter 08 is: Russell Simins of JSBX, Rick Lee of Skeleton
Key, Miho and Yuka from Cibo Matto and Mike Mills, graphic artist.