We got a company-wide email last week saying we would not be upgrading to OS X, at least not for quite a while.
Today, the supervisor of my project came and told me that the co-worker and I, along with some people in Electronic Production, would be getting OS X for this project. I was talking to one of the EP people last week, and he said that there was some sort of bug or missing feature in InDesign that Adobe couldn't or wouldn't fix except in OS X. I imagine that was the factor that got us to do it.
When's that book coming out? Probably not in time, since we're getting OS X installed soonish. Oh well, I know who to bug when I run into problems. Muhahahaha.