It has been about a year since I last published some statistics on the different mobile devices that are connecting to the Exchange servers for email/calendaring. Those statistics can be found here.
There have been 5161 unique mobile devices that have accessed the Exchange service in the month from 09/05/11 to 08/06/11.
As you can see there has been a huge increase in the number of mobile devices accessing the Exchange service and can surely be seen as an indication towards the reliance on mobile technology as a way of accessing University services.
A surprising statistic is that 4299 of the 5161 have used the service within the last 24 hours!