How Much Support do Ukraine's Protesters Have?

What is happening with the Ukrainian protests - and how much does the rest of the country support them? We hear reports that the Governor of the western Ukrainian region of Chernivtsi, Mykhaylo Papiyev, has tendered his resignation after protesters seized the regional administration building. But how much are these protests backed by the rest of Ukraine? How many people there want change? And what changes do they want?