Not sure, but Yandex is actively going to non-russian users lately (they had launch in Turkey, they're doing http://www.yandex.com/), so I'm sure they'll release it some time soon.
I would say that except for the responsiveness of the layout it is as good as google reader. It is a little laggy to load things but otherwise it is all drag and drop, very familiar feeling. It might not be the best but unless there becomes a defacto replacement for GReader, or they decide to keep it, I have a feeling I will just stick with this.
