Update: I had to review their convoluted search feature to find out the first reported mention of ebooks on the Wall Street Journal webberpagenets was MARCH of 2009 by using their "2 years" search button.
Continued Update: Seems I have gone deeper into the online vestige of the WSJ online rabbit hole. You can also set your own dates, which is independent of the whole "7 days," "30 Days," "90 DAYS" and the aforementioned "2 Years" I set mine back to the turn of the century and received an article from December of 08. At this point I stopped caring and went back to playing Dragon Age.