@WS64: "if someone is reading Epub ?" Yes, and some of it is good. I have not checked out FBKindle, so I would not know how they would compare.
@3rd: The character-sets will be solved. I have proposed the "YoCan Reader", as currently I am attempting to make a menu system for several language. Technically it is Duokan, just with a few simple changes, but as it isn't approved of Duokan yet, it was wasn't correct to sail under their flag.
@curstpriest: yup - you seem on top of things here. But for you, I wanted to say that the Uninstall feature has been filed November 11th, but they have not come around to it yet, as far as I can figure out.
You are right about some reader problems, perhaps in relation to character-sets. They are to support Unicode, and this open up a range of issues, as far as I know. ( example text-to-speech, just to say something )
Had no intention of doing this, but after a lot of work on my own English version, perhaps I am a bit biased.