Her last fight was against Obi Wan...she lost and was lying on the ground, then picked up a piece of glass or something and was about to stab him but Anakin slashed her with his saber, injuring her enough that she was out of the fight. Then Obi had a medical unit take her away on a ship, she used a Sith technique to fake death or something, but came back to full consciousness onboard and ordered the captain to fly away from the war and everything, just into the unknown to get away. Dooku betrayed her just before her fight with Kenobi earlier so she was pissed and everything and wanted to leave it all behind.
At least I think thats what happened to my best memory, I havent read the comic in a while...
It'd be cool if Vader hunted her down later on though and finished her off...