Here's an interesting rumor. I've just heard via the Portuguese speaking part of Twitter that Kobo is right now holding a press conference in Brazil. According to my source, Kobo is indeed announcing the partnership with Livraria Cultura that I uncovered last week.
I still cannot find any confirmation of this rumor, but my source has said that her newspaper has sent someone to the press event - which is still going on at this time. And since I already had that story last week, I'm going to go ahead and run with this one.
It's legit, IMO. I will report back when I find out more.
Update: Three Brazilian newspapers were at the event, and now I've been told that their stories have been embargoed until tomorrow's print edition. So I'm keeping my fingers crossed that I wasn't mislead.
Second Update: And here it is.