In this article blogger and CEO of VeraSprite Mark Jaffe discusses why he feels mobile advertising has not reached it’s full potential. His blog can be found at, http://mobilemandala.com 
Quick blurb:
“Group M released some statistics last month that projected mobile to comprise one half of 1% of total global advertising expenditures in 2009. It is projected to be about .8% in 2010.”
He goes on to say,
“Aren’t you just amazed by what a small percentage mobile advertising is of total worldwide advertising expenditures and what a large percentage of time we spend on mobile devices when compared to time spent on other media. Why the difference?
I suspect that one reason is because we as marketers spend a disproportionately large amount of time thinking about what we want to tell consumers and how we want to tell it, and a disproportionately small amount of time focusing on how they want to receive that information and the unique characteristics of the medium upon which it is received. I also suspect that it is because we are afraid to try something new with this new medium of mobile.”
Overall this is a good article that has sparked a lot of debate. Feel free to weigh in on the matter: http://mobilemandala.com/2009/10/18/ten-reasons-why-mobile-advertising-has-not-reached-its-potential-9/
