T.J. Quinn and Teri Thompson, writing in the New York Daily News’s “iTeam Blog,” say a new federal shield law that Senate Judiciary Committee chairman Arlen Specter will introduce this week should help SF Chronicle reporters Mark Fainaru-Wada and Lance Williams keep their sources secret in the Barry Bonds steroid case. On Friday, the two reporters received subpoenas ordering them to appear before a federal grand jury investigating whether Bonds committed perjury by telling a previous grand jury that he didn’t knowingly use steroids. The new law, the federal Free Flow of Information Act, will balance the importance of the information to the public against the crime of violating grand jury secrecy laws.