The Web, as we all know painfully well, is a difficult medium on which to charge money for content. Perhaps, just perhaps, the model will evolve such that many wireless content services will carry a monetary fee.
Wireless devices are more personal.
If you think about your mobile phone, or if you carry a Palm Pilot or Handspring Visor, these small gadgets are highly personalized. You carry them around with you like you do your car and house keys. If you lost your mobile phone, it might be as traumatic as losing your keys. Such personal devices, which you hold close to your body much of the time, require personalized content. With your mobile phone, you're likely to restrict your stock content to changes in the price of your portfolio holdings, alerts when a threshold price has been reached, and perhaps headline alerts when significant news breaks that involves a company in your portfolio.