Some updates:
* President Yanukovych has been impeached but refusing to step down. Calling it a coup and the opposition Nazis.
* Opposition leader, Yulia Tymoshenko, has also been freed from prison.
* Police have stopped guarding Presidential buildings and protesters are moving into them.
* Allies of Yanukovych have been attempting to enter Russia but being stopped at the border as has Yanukovych according to some reports.
* Apparently there are now whispers of separatism for the Russian leaning East to leave the Ukraine but nothing conclusive yet.
From the BBC