We're pretty excited about Janus over here and are considering switching over in the near future (I'm actually trying out OLAP with hadoop 2 as we speak). I'm normally quite hesitant to put very early releases into production (I never would have done that with the 0.1.0 of Titan) but since Janus is a fork from Titan I have a feeling that it'll be much more stable than most software at this point in the lifecycle. I want to reach out to the community to see if janus's 0.1.0 release underwent the level of testing and rigor that went into the 1.0 release of Titan. Does anyone have any insight into this?