[stuhacking]

This is why you can do: (load-file "/<user>@<host>:~/.emacs")

(Assuming your 100+ machines are capable of reaching your home directory in some way (ssh, ftp, ...). If not, you could also put your desired emacs init in a publicly accessible location.)

Edit: Or put a copy on a USB drive, or diskette, or floppy.

[sliverstorm]

(Half the time a given box didn't even have network access)

[pdelgallego]

Or even simpler, just upload your .emacs (even better, all the dot-files) to github so you can load or clone them anytime.