It's getting kind of dated now, but Neal Stephenson's "Mother Earth Mother Board" is great reading if you're interested in both the history and the process of laying submarine cable: http://www.wired.com/wired/archive/4.12/ffglass.html
It's not exactly what you outline, but The Geek Atlas by John Graham-Cumming lists many places that would fit the description "hacker tourism." It's a travel guide... but it's published by O'Reilly!
