Beeline have just introduced Data Roaming which works in 260 countries (every place I could think of, including West New Guinea and South Korea). This is exceptional coverage, and the rate isn't bad, at least for email. Usage is unlimited, after 7MB from the 3G networks you are throttled to 16KBps for the rest of your unlimited 24hrs. Cost is six euros (249 Rubles) per 24 hr period.
Details here (what we do without Google Translate?)
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I have two Vodafone Ireland cards when I travel, but they have just cut back their Rest of World countries to only a handful. Now Beeline will fill that void.
So if you purchase a Beeline card when in Russia (or on Ebay) you will have the likelihood that wherever you go you will have basic Internet. And IMO that is priceless...