Yup, it's this one I was thinking about.
I've recently heard of Kishiro planning a sequel, after having worked on the video game, but this information is highly subject to caution, because so many things have been told about this that... Well, in any case, yes, I remember the manga's ending, and, err... if he can put with a GOOD sequel, I won't say no
I'm always confused with the names though. Zalem --> Tiphareth, Gally --> Alita, while in our version Alita's the name she receives when she's transferred into... oh crap, spoiler to come, so I shut up... But here it is, I'm always confused with those translations o_O