An idea proposed by Kenneth Brecher of Boston University. That the speed of light in a vacuum be renamed Einstein's Constant to help alleviate confusion that can be produced when talking about the speed of light. After all how fast light travels, in mediums such as water, is often much slower than Einstein's Constant. Precedents for this move include Newton's constant of gravitation and Planck's constant of quantum mechanics.
Einstein's Constant is 299,792,458 metres or 186,282 miles per second.
Personally I think it a terribly good idea and I am going to add it to my (insane) campaign to expand the English language.