Hackerspaces are popping up all over the place. I founded one here in Cleveland (We're not detroit!), and hey, even detroit has one. You can find one close to you at http://hackerspaces.org/wiki/List_of_Hacker_Spaces

For a book with "Pro" in the title, I expect more than "...and there are only a few places where the code does not match the narrative, or the code is incorrect in some other way". I'm rather surprised that a book that is attempting to be a learning guide would let *major* errors such as that through. I suppose I'll go for my learning somewhere else.

I am also not a professional. However...

The paper describes the time dimension heading toward a singularity. So, we'll get the universe rapidly expanding outward faster and faster. However, there will be a point at which there is a "big freeze", where time will stop. However, there is no 'experience' of time stopping. Instead, we would experience time as normal as we are attached to it, and would have no clue that we can go no further. There is a very interesting description of this in "Einstein's Dreams".

So, putting it into your explaination, all that spaghetti rotating in the forth dimension would keep doing so. Only an observer *outside* of time could ever see the change in the brane-space and only they would ever see the stuck versions of ourselves at the point of the signature change.