I just order one yesterday. Based on the paper I read, both Obi 110 and Obi100 can配置其他voip帳號.
Check this paper out.
http://voxilla.com/2011/01/24/how-to-use-google-voice-and-obi-for-all-your-calls-free-2512
In the Part 7-Get Google Voice on your OBi
C. The Coolest
It mentions that you can configer Service Provider 1 and Service Provider 2 if you open a obitalk.com account. You can check it out yourself. I am only two-day VOIP齡（I started to check VoIP two days ago).
