I've seen it referenced twice now, and I feel as though we have missed something. DeeJ referenced it in a mailsack when he said we would receive some sort of prize for being around for the ARG. Joe Staten mentioned it in an [url=http://www.oxm.co.uk/52453/features/destiny-bungie-talks-character-load-outs-the-grognok-engine-and-mapping-the-solar-system/?page=2]interview[/url] with Xbox magazine. The point being that Bungie has been giving hints, and we must act on them, we need to go deeper. We must identify the source of these passages.
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I'm pretty sure it was a hint at what planets would be in the game. It ended in february (See page) when the vidDoc was released so it seems likely that was the extent of its significance.