I agree - locking in the braodband customers early is the key as I think once in place, these customers would be reluctant to switch.
You say you are into wiireless broadband. Are there any security concerns there? I have taken a small stake in SKG, one of their products is wireless broadband and their usage minutes have grown dramatically, although I know no-one personally that uses it.
What is your perspective on wireless broadband, what are the obstacles and opportunities?