I think it was mentioned that it "may" be coming later at the K2 conference this year, but no definite announcements.  I think the focus is probably on Apple and Android at this point.  I don't work for K2 so I can't say for sure, but I wouldn't hold your breath. 

You can probably thank BlackBerry's recent market performance for that.

Good day 

Here's an interesting read about K2Mobile and what we support currently: 

http://www.k2.com/mobile

Kind regards

Nelly

I did look at that page but it's not terribly helpfull.  There is no detail on what is supported for the blackberry ... just a link to the app store which doesn't even mention OS compatibility.  If you attempt to download the app using the QR code on a BB10 device it states that the operating system is not supported.