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This picture is linked to the University of Pennsylvania-Wharton Campus website but has some good information on the typical devices that students and teachers currently own. The droid, blackberry, iphone and ipad are devices that 

    This also came from the University of Pennsylvani's webwsite: Anice chart to help you know what works with your device.
"SPIKE and Course Calendars: List of Supported Email Clients and Mobile Devices

Mobile devices and e-mail clients support calendar subscriptions, imports, or both, depending on the device. (For detailed information, see SPIKE Calendar Feeds – Subscribing/Importing Events and Courses Schedules). "