Quoteis there a way that a friend overseas with an OBi 100 can call my OBi 100 in the U.S. via an OBi to OBi call, get my auto attendant and then call out to the U.S. via my OBi and thus avoid the 1 cent/minute charge?
This is one of the best features of the Obi. Once you add the other Obi to your circle of trust, a call from the other Obi will get your auto attendant and can then press 1 to make a new call. (This is the simple intended way but not the most versatile for outgoing calls).
QuoteIf so, whose number would show up on the caller ID of the person receiving the call?
The number will be that of the service used to place the call from your Obi. If the call goes out on your google voice line it will carry the caller id of your google voice. You could set up their google voice account as your sp2 and then if they call out on that service it will carry their google voice id.