Wikipedia says it came out August 18
They were also giving out physical copies of it at Quakecon a couple weeks ago
but the article is about transmission with visible light and this discussion has already been had in the thread above.
so quit being pedantic and either tell us why this is better or admit that it's worse
MEIN FÜHRER! I CAN WALK!
That's the thing about people who think they hate computers. What they really hate is lousy programmers. - Larry Niven and Jerry Pournelle in "Oath of Fealty"