I just bought my first batch of Bolshoi tickets and can provide a little more information. What's on sale right now are packages, including "ultimate Bolshoi experience." They went on sale for Friends today and for the general public on January 21. If you buy tickets for each of the three ballets, you get a 15% discount. But you have to buy the same number of tickets for each ballet. I.e., you can't buy tickets for 3 Swans, 2 Don Qs, and 1 Spartacus. For any extras beyond the package, you need to come back in late March and buy single tickets. Go to http://www.lincolncenterfestival.org/ and click the "special offers." You can join the Friends for as little as $100, so if you're buying these packages at 15% off, it almost pays for the Friends membership.
If you use the web site ordering, you can't pick out a particular seat and they don't have any charts on-line to show you which seats fall into which price category. You can get a Koch theater seating chart from the Koch site, though. I called the box office (212-721-6500) and that worked best. I had about a 5-minute wait, but it wasn't bad. They needed my Friends code (which you get by e-mail if you're a Friend) and the operator also checked their records to see my membership number (so "borrowing" someone else's code wouldn't work). The operator was able to tell me which seats were available and pricing from the range of places I normally like to sit. They are not using row A in Orchestra (unlike NYCB), and are starting instead in Row B. They do not mail out tickets or send them as e-mail attachments; you have to pick them up at the box offices at Fisher or Tully in person. I hope that helps!