Noam Cohen has an article ("Bubble or No, This Virtual Currency Is a Lot of Coin in Any Realm" on the bitcoin valuation and "bitcoin mining" Sunday in the New York Times, here, "Link by Link" series. . Cohen explains also how some people feel that bitcoin transactions are harder for governments or maybe stalkers to track.
On Sunday, April 14, Neil Irwin wrote an article on the Washington Post Wonkblog, "Bitcoin is ludicrous, but it tells us something important about the nature of money, here.
Update: May 28, 2013
Timothy B. Lee has an important Washington Post Wonkblog article comparing Bitcoin to Liberty Reserve, as to whether the fibbies would really try to shut down Bitcoin (could they?), link here. John Grisham would love this.