I flashed mine and don't intend to go back the the Jinke updates.
With version 20090120 (not quite 0.2 yet) there is a keyboard for searches that works well. It has the English and the Cyrillic alphabets and (I think) some others. Don't think a USB keyboard is available and may not ever be.
The OI update seems to work well, you just need to remember what functions are mapped to which keys. I still have to keep my cheat sheet nearby for some of them.
And I love that you can delete books from the reader.