Nathan Maharaj is the go to guy for much of the content related negotiations and discussions. He and his staff monitor
www.getsatisfaction.com/kobo. I have never seen him post here in the MR forum, but that does not mean that he isn't reading here, of course.
From the contact I have had with him, I know that there are all sorts of weird things that happen in obtaining rights to sell a particular author to folks in a particular geographic location. I know he worked very hard over a prolonged period of time to get books by Louise Penny (a well known Canadian mystery writer) available via Kobo for Canadians. They finally got rights to the books, but wow--the publisher has definitely not made them competitive with Amazon's Canadian prices for the same ebooks.