Haha, I can barely keep up with your mixes. I just discovered 14 through 16 a month ago, have only listened to 14, and now there's 17! Excelent! You put my "one mix per year" to shame.

Oh, and:
> This is one lightyear per second, or 31,557,600 times light speed to be precise.

Seems like the use of two units of time is redundant. Wouldn't it simplify to:
about 9,454,254,955,488 km/second
about 34,035,317,839,756,800 km per hour
about 21,148,566,016,188,547 miles per hour

WOW that'd be fast.

Now, there are greater units of the meter (kilometer, etc), but are there greater units of the mile (megamile? = 1million miles?). Ah, they just measure stuff in light years at that point. Or, rather, light years per second!