Technology is changing the way that people do most anything. Now with chips becoming smaller and phones becoming lighter and compressed it's only a matter of time before it's the only device that people need as a MP3, organizer, calendar, phone and training log. People wear arm bands to carry their iPod.
If Actively Mobile can get a couple of issue fixed this would be great, I would use it, and it could fit into a couple of companies that I have talked about before. Polar has partnered with Nokia for Mobile Connectivity, again it is getting to a point that people feel safer taking a mobile phone while exercising.