Oh. My. Freaking. Goodness!
This is quite a chapter! I don't recall the last time a book chapter gave me such a jolt...
Great work! I can't wait for more!
[spoiler=Technological mutterings /w/ a potential plot spoiler]
So, we have a couple of possibilities here.
#1 (preferred): Terenia ended up in an alternate (parallel) universe where Claire was still alive. Given some of the others' destinations, as well as Claire's surprised reaction to the news of her "death", I wouldn't be too surprised if this was the case.
#2 (nasty possibilities): the nanovirus has the ability to alter... the very fabric of spacetime? Or perhaps worse? I don't want to even think about what could happen if this is the case.
I don't think there is a logical third scenario, but I could be wrong.
[/spoiler]
(Just a thought: I've read RotB, so I know the background. I doubt there are many who haven't read it, but you might want to link to it on the first page, just in case someone hasn't. This chapter's effect is totally dependent on the reader having read RotB first)