Wow. You really came into this prepared. How long did it take you to research all this since the article appeared on Slashdot? Did you have some help tovarisch?
This is about Russia's current bad behavior, not the sins of the US. Nice try.
The bottom line is that Crimea is a semi-autonomous territory that is part of Ukraine and has been since it was legally given to Ukraine in 1954. Russia's annexation of Crimea has absolutely NO legal basis at all. The referendum was a farce, and everybody knows it.
Crimea is heavily dependent on Ukrainian tourism and resources (water and electricity being the most important). Kiev should take maximum advantage of that and exert massive economic pressure on the Crimean peninsula. Ban all Ukrainian tourism and strangle business transactions with red tape. Raise the price of electricity and water to the sky (and if necessary, phase out water and electricity completely. Let Russia pay for building new infrastructure to its new prize.)
With Crimea an economic drain and in combination with Western sanctions, Russia's economy will suffer as it hasn't suffered since the 90's. I'm sure the Russian public will appreciate this....
If Russia still refuses to surrender Crimea, then Ukraine should escalate to the next level and implement low-level guerrilla warfare. Ukraine has a proud history of partisan warfare. Operating in Crimea, a few dozen sniper teams and a few hundred special forces would send dozens of young Russian soldiers back to the motherland in zinc boxes every day. Unless Russia wants Crimea to turn into another prolonged conflict like Chechnya, Putin would be wise to let Crimea go and worry about the damage to the Russian economy and its relations with the world.