It made it into Washington Post today as well, so if it's "clean" enough for them, it's certainly legit for Subsim posting!
I've been a supporter of Archive for the better part of a decade. There is a lot of fantastic stuff to be found there - from old radio archives to uploads of artist-sanctioned bootlegs of concerts to, of course, the wayback machine. The games collection is just another great addition to what's already one of the finest sites on the internet