After lot of coding, I can say that this phone is fully supported. All basic services should work in my Gammu branch and changes should be soon merged to official branch.
So what works?
- Phonebook with most of entries (no picture, voice commands and ringtones)
- Various information, including detailed filesystem status and battery temperature ;-)
If you're using original Sony-Ericsson cable, try following configuration, and send me gammulog, if anything goes wrong:
[gammu] connection = at port = /dev/ttyACM0 logfile = gammulog logformat = textall
Update: All needed changes had been merged in 1.09.00 release, so you don't have to care about development versions.