The Wall Street Journal Law Blog says big regulatory changes are under way:   “Dodd-Frank is Sarbanes-Oxley on steroids. It’s an exponentially greater volume of regulation,” says Margaret Tahyar, a Davis Polk partner. The “sheer number of rules still in the pipeline makes it almost inevitable agencies will miss an increasing number of deadlines over the next year.” The Dodd-Frank law has 849 pages, compared with 66 pages in the Sarbanes-Oxley Act, a 2002 law that overhauled accounting rules following the Enron scandal. The landmark Glass-Steagall Act, which created the Federal Deposit Insurance Corp. and barriers between commercial and investment banking…