Maybe I am doing the math wrong, but I think the plot "Minor Violations of the Laws of Physics" has the Shannon Limit 2x smaller that what it should be.
According to [1], for each 2x increase in SNR, the limit should increase in a full Bandwith.
However, when we compare the plotted values at 45db and 60db, we see that SNR increased 15db = 5 * 3db => 2^5.
That way, the limit should increase in 5 bandwidths.
But the plot increased from 300Mbps to 400Mbps => 100Mbps.
Hence the plot was made with a bandwith of 100/5 = 20Mhz, instead of the 40Mhz mentioned.<p>[1] <a href="http://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem#Statement_of_the_theorem" rel="nofollow">http://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem...</a>