Cave has always had different divisions making cellphone games and other random junk like Princess debut and that SMT MMO. It's just that lately, the core group (Ikeda, Yagawa, Ichimura, etc) has been working on other stuff, like Nin2 Jump and the VN, so it's hard to say what they're up to any more. So hopefully next year they'll start focusing on arcade games more heavily, with a 360 port every now and then.
I wonder if they have anything planned for the end of the year. An HD Mushi pack with version 1.0 and 1.5 would be amazing. Or Ibara + Ibara Kuro. But I'd rather have Mushi.