upped oscp-remote.py, when you uncomment id="n900" line it will enable code to listen for dbus event. right now i've configured it to following actions:
with hs-48: pressing button skips to next track
pressing camera focus button halfway:
- short: ffwd
- long (>0.5s): pause/play

if you have bluetooth headset and send me log of dbus-monitor --system when pressing buttons, i can try to add them