aone has completed quite a few series ... I'm pretty sure the completed episode count is closing in on 1100 now, not including private group-only releases and things done under other names. Significantly over 1100 if you include all of that.

You can find a fairly complete list of things the group has done at animenfo's group info page for them: http://www.animenfo.com/animefansub/group.php?id=50

I dunno what their current projects are, offhand. I know they're probably still working on Daa Daa Daa and Kyou Kara Maou (unless they finished one or both of those up, but I doubt it) ... and then I know Sousei no Aquarion and Ah My Goddess TV, and of course Naruto. Dunno what else if anything though.