It was nice meeting you at PlugNPlay and thanks for the write up. We do indeed have something more up our sleeve to compete with the "VoIP" service providers that look at video as just another codec.
One comment on the prevalence of broadband connections. Of the US internet users, nearly 90% of them have broadband today (60% of US households have internet access). So most of the people will might target already have broadband (at least over 150 million people so we don't worry about those without internet access.
And yes it makes perfect sense that some people would want to use their PC for video while others might want to use a phone. Stay tuned for more on that and stay in touch!