Diana Olick's latest column puts "principal writedown" in perspective: "The government is officially giving borrowers back home equity. Yep, somewhere between $35 and $50 billion worth. Of course we've all lost over $5 trillion, but who's counting? Lenders still aren't required to do it, but they're going to get an awful lot of taxpayer-funded incentives to do it…Let's face it, the underwater issue (that is borrowers owing more on their loans than their homes are worth) is now far bigger than the subprime issue and the unemployment issue. Yes, it's concentrated heavily in five states, but it still manages to...