Since this was brought up, I will just ask if any efforts are being made to shorten the time it takes for the OBi to send the "1" and connect the call through. Once the phone is picked up, the Obi should be able to answer the call, send the "1", and connect the audio path through to the phone in well under one second. In experiments with Asterisk, I was able to have it answer the call, immediately send the "1" (in other words, no programmed waits at all), and then bridge the audio, so the entire process took under half a second (in fact it seemed almost instantaneous). Contrast this with the OBi, where when you use that setting and pick up the phone, you have to count off a couple seconds before saying "Hello" or it's likely the caller won't hear your answer.
My thought is that maybe you could have a configurable time (in ms) before sending the "1" tone, that would either default to 0, or something relatively low (like 200 ms). The touch tone itself doesn't need to be long (100 ms would be serious overkill) but I suppose that could me made configurable as well. Once the tone is sent, there's no good reason whatsoever to delay connecting the audio path though - that can happen immediately. So I would hope that this excessive delay is being fixed in an upcoming firmware update.