Indeed, it is called Phone [4], and has been under constant work for a month before reaching version 0.0.9 [5]. While its initial feature set is still limited to the essential parts (calling, being called and texting), the project already features a plug-in system, including:
- profile management
- hardware-specific support (eg for the Openmoko Freerunner [6])
- additional security features, with SMS encryption being already implemented and functional
[1] http://www.defora.org/os/project/list
[2] http://lists.defora.org/devel/2010/04/msg00030.html
[3] http://lists.defora.org/
[4] http://www.defora.org/os/project/display/3343/Phone
[5] http://www.defora.org/os/download/download/3360/Phone-0.0.9.tar.gz
[6] http://www.openmoko.org/
[7] http://people.defora.org/~khorben/temp/DeforaOS/





- http://www.hackable1.org/
- http://trac.hackable1.org/trac/wiki/DeforaOSSmartphone
I am also working on actual, ready-to-flash images already (for the Openmoko Freerunner).