I don't know exactly, but it seems like yahoo using it, i see github commits, and it seems like every 2 weeks on friday they release new version (minor build). there is 2 yuiblog entries with video about mojito and axis. and yes - i want roadmap too, and it's interesting what are future plans at all. project is very good, but not very popular yet.
Thanks for your enthusiasm and usage of Mojito. We are very much alive, and as Alexey pointed out, real work is happening on GitHub -- I hope you'll agree that's what matters the most. I can also confidently say the project is staffed and has a lot of company support behind it.
I realize we haven't been super active in the forums recently, and I apologize for that. While the transition from our internal systems to public ones is complete, some of our processes are catching up. E.g. we just got the release notes going. https://github.com/yahoo/mojito/wiki/ReleaseNotes0_3_28 I'll be publishing a public roadmap soon.