I saw a google trends thing (I think it was) showing a massive, sudden spike in certain terminology in, e.g., the NYT. People were "waking up" to the corruption on Wall St., to the fraud of ACORN, to the Community Reinvestment Act, eyc. Ron Paul was spreading the Audit the Fed and End the Fed message. The movement was growing fast.

But the ideological roots go back much further to the 60s, mainly. Just didn't have widespread institutional support until the 60s radicals, who "went to the schools" gained in position. James Lindsay has been all over this for a few years.