The console (in Italy) of South Ossetia told me.
It should work like this: I send an email to the Foreign Ministry of South Ossetia; the consul gave me the email address (MFA-RSO@MAIL.RU), but said there is not a website, he wrote saying that knows me, and Minister gives me permission. There is nothing to pay.
The problem is that I have to state the precise dates and this is difficult because, as usual, in a motorcycle trip I can not know exactly when I will be in one place, especially since the passage in Ossetia will be in the second part of the journey; In any case, I do not like to be tied down.
But I have to adapt to their rules (especially seems to be important to be precise about the date of arrival in South Ossetia), so now I download OSM updated maps and precise route calculation and times: in fact, I have to change the path, because originally the passage in Abkhazia and south Ossetia was planned before Russia (coming from Georgia), but now it will take place after visiting the south Caucasus, then coming from the north, from Russia.
Meanwhile, last night I asked (by email) visa Abkhazia. The abcazi should respond in a week (it is written on their site; even the consul said that they are faster); Instead Ossetia should have more time (now the consul told me about a month).
The Russian visa (multiple) and Azerbaijani do them here in Italy; Armenian will do it at the border, so you do not have to make too many date calculations.
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It remains to find evidence on which the border is open between Russia and Ukraine: there is no one who has recent news?

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www.gold-wing.it -"The aim is the road"- RoundTheWorld
Marcello Anglana - Gold Wing 1500 - km 915,000