Yes, we are working on a good quality mobile frontend. Right now we are in Private Beta and would love for you to join.

do you integrate multimedia steem applications - dtube, dlive, dsound?*

We are planning on making videos uploads via mobile either through ipfs or directly dtube. But that features is definitely a must have. Hoping that in the future there will be much more of course, so that we can speed up the development process. Yes, I agree @aggroed has been very helpful and many others, too.

do steem major stakeholders know and support your work?*

In the credits section above we have a lot of supporters, but not that many major stakeholders I would say.