Check it out

Dr. Gunter Nimtz has done previous work, with various associates, on photon tunneling during the past 15yrs. In one experiment it was reported that tunneling occurred at a speed equivalent to 4.7c ***.

For anyone who can make head or tail of it (I'm still struggling) here are two pdf files from G. Nimtz and A. A. Stahlhofent:

http://arxiv.org/ftp/arxiv/papers/0708/0708.0681.pdf
http://arxiv.org/PS_cache/physics/pdf/0009/0009043v1.pdf

*** "a group of physicists have performed experiments which seem to suggest that FTL communication by quantum tunneling is possible. They claim to have transmitted Mozart's 40th Symphony through a barrier 11.4cm wide at a speed of 4.7c. Their interpretation is, of course, very controversial. Most physicists say this is a quantum effect where no information can actually be passed at FTL speeds because of the Heisenberg uncertainty principle. If the effect is real it is difficult to see why it should not be possible to transmit signals into the past by placing the apparatus in a fast moving frame of reference."

http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/FTL.html#11

There is a difference between phase velocity and group velocity. Who knew?

http://www.everything2.com/index.pl?node=phase%20velocity

http://www.mathpages.com/home/kmath210/kmath210.htm

http://krypton.mnsu.edu/~7364eb/Math113/groupvelocity.html

Not me, for one, TFF. Which is why I said that I'm still trying get my head around it. Your links are probably a good place to start.