I played a little bit around with this watchapp (SmartWA Mod 2):
http://www.mypebblefaces.com/apps/21105/10414/

The latest version of SkippingStones(0.13) adds experimental support for this watchapp:
https://github.com/ruedigergad/Skipp...l.rpm?raw=true

What should work so far is:
Music player control (next, previous, play/pause)
The watchapp showing now playing (artist and title)
Phone battery indicator (The battery status is currently polled in 2 minute intervals.)

The volume settings actions are also already correctly received by SkippingStones from the watch.
The only thing missing is the proper integration on the phone.
If anyone has a clue of how to de-/increasing the volume can be done programmatically a hint would be really great.

Similarly, if anyone has a better way for querying the battery, e.g., via dbus, a hint in the proper direction or a sample code snippet (or even a PR ) would be great as well.

For now, only the very watchapp linked above should work.
However, adding more variants of https://github.com/robhh/SmartStatus forks should be easily possible as well.
If you discover, that a particular app is not supported, send me the debug output (particularly the app uuid) and I will see what I can do.

Edit:
@vasvlad, I saw that you are committer (owner?) of MeeCast.
Do you happen to know if MeeCast offers a way for other apps to get weather updates (like dbus signals)?
If there is no such way yet, would it be possible to add it?
I think dbus signals would be the easiest and straight forward way for this.
I am asking because the SmartWA watchapp, I linked to above, is also capable to display weather data.