Comscore reports that mobile data usage is up 51% over the past year. They have it broken down by Browser, SMS, and Downloadable Apps.
Subscribers Accessing Local Mobile Content* by Access Method, Three-Month Average
|March '08||March '09||% Change|
|Any access method||21.5||32.5||51%|
|App downloaded to phone||6.2||11.3||83%|
* Local content defined as searching for information on maps, movies, business directories or restaurants
(US Mobile Subscribers Age 13+)