Kobo announced today that they had just completed a Series C round of financing led by Fidelity Investments. They didn't discuss the amount raised, however, but the press release did say that the 2 of the 4 owners of Kobo, Indigo and Cheung Kong Holdings, invested more capital in the company.
As for the other 2 partners, RedGroup Retail and Borders, you probably remember that they are both in bankruptcy at the moment. I'm surprised that I haven't heard any rumors about someone buying their interests in Kobo.
Kobo also reported that they have built a catalogue of 2.3 million ebooks since they launched last December, and that they now has 2.7 million users. Also, note that the pace of its expansion has accelerated — taking 10 months to reach 1million users and less than three months to add the second million.