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"440 million years is a long time...when the supernova exploded, the earth was in the early Silurian period of the Paleozoic. The dinosaurs arose, flourished, and disappeared while this light was making its way here."

There is an assumption built into that statement that that the speed of light (c = 299,792,458 m/s) was constant for last the 440 million years.... if the speed of light was slower in the past this number could be more...if the speed of light was faster in the past this number could be less....

There has been some intesting work on this subject the last few years.... first peer reviewed published by Setterfeild in 1987....

Setterfield and Norman SRI in July 1987
Dr. Joao Magueijo, a physicist at Imperial College London

http://en.wikipedia.org/wiki/Jo%C3%A3o_Magueijo

Dr. John Barrow of Cambridge
Dr. Andy Albrecht of the University of California at Davis Dr. John Moffat of the University of Toronto

have all published work advocating their belief that light speed was much higher – as much as 10 to the 10th power faster in the past...

Variable speed of light theory:

http://en.wikipedia.org/wiki/Variable_speed_of_light

http://www.setterfield.org

From the very link you posted. This is silliness.

"Some Young Earth Creationists have investigated the idea of a changing c in 1987[46] as an explanation for the discrepancy between the biblical and measured ages of the universe. This idea was mentioned by Marilyn vos Savant in Parade magazine.[47] This idea has been refuted.[48]"

Actually the speed of light was changed by Satan, in the year 4236 B.C. to confound various angels. This change in the speed of light caused several angels to fly into planets, breaking limbs and mussing their hair.

As a side effect, it confused human beings, who began to believe that the universe was billions of years old, when it was really only 6000 years old.

Yahweh was not amused at all, and fixed the speed of light. Satan was severely chastened and his air conditioning was shut off for 1258 years. The dispute still goes on, although it is generally accepted that the speed of light is approximately 186,000 miles per second.

Some human beings, however, are still confused about this and major arguments have taken place over the years.