Well, what is happening is Ukrainians having enough of corruption, theft, attempts at dictatorship and incompetence. The government tried enacting decrees that would essentially make Ukraine a dictatorship, but it turned out people weren't suppressed enough for that. Now they want change, and this is not going to stop until they get it. It was bound to happen one day, really. People has had enough, and the best thing the government could do now would be to resign en masse and declare elections. Not that it's going to do that, so I'm afraid blood is gonna flow.
I only hope this ends with relatively low causalities and without military intervention. However, the situation could as well spiral into a civil war, and it won't be NATO doing peacekeeping if that were the case, I'm afraid... Russia's pretty comfortable with Ukraine being dependent on it, and would try to turn it into a puppet state, given the chance.
Also, it's strange that I didn't see it discussed much in the western media. Too distracted with the Olympics, I suppose... It's been all over Polish media for quite some time, and there's popular support for the protesters over here. For example, reports about fatalities were there long before the BBC article. Not as many as this time, but still. There were also "solidarity protests" all over the country. I wish the issue got more attention from the west, but there's an inherent risk of annoying Russia by this.