Portio Research has released its report, Slicing Up The Mobile Services Revenue Pie, which looks at the total market value of the worldwide mobile and wireless market. The report examines which services the money comes from; which regions the money comes from; and where the money goes to. It also includes regional subscriber forecasts, handset shipment and revenue forecasts; and detailed revenue forecasts to 2011 for SMS, MMS, mobile video, music, games and other services.
Portio notes that industry forecasts predict that 2008 will be the year that the worldwide mobile industry becomes a $1 trillion (500 billion) industry. It adds that 2007 became the year to see worldwide mobile handset shipments exceed 1 billion for the first time, and as 2008 begins so the world also crosses the highly significant 50% mobile penetration point. 
As mobile voice prices have declined and margins have come under intense pressure, network operators have been forced to look at non-voice services to win new customers and boost margins. A wide variety of value-added non-voice services have emerged, from messaging and mobile music, to email, Mobile TV and video downloads, location-based services, games, gambling and mobile payment services. In 2007, worldwide, non-voice services accounted for 18.9% of total mobile services revenues, and this figure looks set to keep growing, reaching more than 25.5% by the end of 2012. To put that in context, worldwide consumer spending on non-voice mobile services in 2012 will exceed $251 billion (125 billion). 
The report costs 1,495 for a 1-5 user PDF licence; 2,495 for a small or medium-size PDF company licence; or 3,995 for an enterprise-wide licence.
You can get more details here. And a brochure here.