While there is an asterisk package in optware, I still have some troubles setting up the google voice incoming (outbound is ok). Since asterisk 1.8 support google voice directly, can you compile asterisk 1.8 with basic google voice setup in a new beta tomatoUSB? From google voice section in tomotoUSB GUI, I hope there are only fields for a gmail usename and password input.
Advantage of builtin asterisk1.8/google voice:
1. No optware/asterisk needed. Not everybody can install asterisk 1.8 (with all added library and voices) correctly, let alone writing those conf files.
2. Simple, easy and consumer friendly for users.
3. Not too much extra work for ROM developers.