Hello!
You have wrote, that soon a new jomsocial 4.0 stable will be released.
We want to build our new site, using this jomsocial 4.0.
Also we want to make an ios native app, that will be similar and synchronized with our site.
Thats why, as I understand, we need to use yours jomsocial api for this app.
The information regarding our API's is still current and will be updated shortly after the release of Jomsocial 4. I have heard of a few users that have created apps that work with Jomsocial