There some kind of group that's started working on Part 3 again. They finished two volumes worth in August. But their page is just a mediafire page. I'll check when I get home, I think there's a link in my bookmarks. Like a bunch of groups, they're just doing new scanlations from the old crappy scans. Which aren't FANTASTIC by any means, like the Invincible Three or Jojo Project, I think they were missing the titles for some odd reason, but otherwise they were decent.
My group is working on doing volume scanlations for Jojolion. But it's a side project for everyone. I still need to translate 4 more chapters to have done the whole series because at first other groups were doing it, but they all died off, so me and some other Jojo scanlators joined together to take over.
Part 5's old translations aren't good. There are a bunch of places where there are large errors on the same level of part 4. The difference is they're EDITED so they at least make grammatical sense. But the translations are erratenous in more complex lines. I'm glad to see the Jojo Project guys have gotten going on it.
As for Part 4, they only have 7 volumes left. So they're doing fine. They'll probably finish next year.
I think the first like… 3 volumes or so of Part 6 were done by that crappy group. But past that is fine. Hopefully that beginning part will get redone at some point.
Edit: Here's that link
http://www.mediafire.com/?753k0o98m8j9l