i'm past the 4 worlds that you have to find the maps in, i'm on the 'other' world after that. (not a spoiler is it?)
i have to say, even if you never use him. HK-47 is the best to bring along for comic relief. he's easily the best useless character to bring anywhere. doesnt matter if you're light or dark jedi, buy him or steal him. Observation: he's f'n hilarious... so you meatbags better get him.