Hello,
I want to use my Pi to do remote/voice :
1. (roaming GSM) calls
2. monitoring - my house (using camera and microphones) - snmp traps / alarms
3. control dors,lights heating.
Since for sure I'm not the only one wanting this , if you find/have any interesting tutorial / ideas how we can make this happen please feel free to share it ! 
Thank you !
Cristian