It's worth noting that the guy that wrote the corresponding law for the State of Washington explicitly blames obsolete laws for the nonapplicability of the shield law: "Oregon's law was probably written before blogging was accounted for." [1] He goes on to say that she probably would still have been judged against, since withholding the source means she can't prove her claims are factual, but that she still should have gotten that protection.
[1] http://blogs.seattleweekly.com/dailyweekly/2011/12/unlike_or...