Try to live without typing in Russian, although you may search for cyrillic hack of firmware 3.2.1 (personally I did find it, only for version 2.5.8 from Zerochaos and much elder from Boroda).
But I suppose, after Cyrillic hack you will lose unicode fonts of Kindle 3.2.1
BTW Duokan is not suitable for Cyrillic too.
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