A single base station will handle 30,000 subscribers using 300 minutes per month, based on current cellular-usage models. But we expect to drive a change in usage patterns. Even at 3,600 minutes per month, the system will support 2,500 users.

A number of companies have expressed interest, but nobody's signed up yet.

We're designing for North America, but we have some strategic interest outside. If it's deployed internationally, it will have to be in licensed bands. A lot of developing countries would be easier for 'greenfield' development.