It's an interesting idea, and nice to see, but honestly I'm not sure if the convenience of it all working 'out of the box' justifies the cost. My company, for example, set up almost all the functionality they offer in about an hour of Python scripting (using Tropo.)<p>Eventually, we spent about an extra hour creating an actual support rotator that allows you to toggle your number on/off when you don't want to deal with answering phone calls.<p>It was entirely free to set up and develop. There's no pressure to transition to a paying account, either. When you do decide to transition, it's much cheaper than any of the TellFi plans, any way you look at it.<p>Additionally, Tropo has <i>great</i> support - I've wandered into their IRC at 4:00 AM and gotten nearly instant feedback, every time.<p>So, basically, if you're decently technically proficient, I don't see the value add of TellFi.