Well, I would imagine that the faster you can ship the bits,
the faster anything can happen -- including BGP convergence and
botnet attacks (too!). 
Yeah, I realize that the possibility to actually "speed up"
light via the optical transmission systems may be a long
ways off (or simply impossible in practicality!), but I
thought this was interesting.
- ferg
To make this operational, will this speed up BGP convergence?
(note that there is a difference between group velocity
and phase velocity. The posters of "300,000 Kilometers Per
Second. It's Not Just a Good Idea, It's the Law!" are still
valid).