I'd like to get some kind of very brief sound or whisper to let me know the outbound voip "line" is being used. My Obi110 was falling back to the PSTN line because the Obi's power got unplugged. By the time I noticed, I'd spent too many $$$ making calls at Verizon's full rates. I realize there'd be no whisper if the Obi were powered off, but I'd notice something was missing.
Alternately, maybe some kind of modification to the Obi's dialtone so I can tell when it's alive, though that might not work for some people if their phone's autodialer mutes audio during dialing.