He mentions sources in the comments section and clears his intention with:

"This article highlights US laws are imminent based upon an increase in research activity into Bitcoin by the US courts service."

We've been discussing this article on the Bitcoin forums and I think we all know it's coming whether we agree with it or not. We can see any law passed against Bitcoin will affect it's market value.

Point 5 at the bottom of the article (Further Work) is worth a look.