Let the hive mind of Engadget get that for you.
"I'm in the market for a new phone and money isn't a limitation. I'm also not partial to any particular US carrier, but here are some of the features I'd like to have: WiFi, GPS, good coverage in lots of places, push Gmail (a must!), physical keyboard (a must!), a touchscreen, decent battery life and a relatively slim body. And please, nothing that has a fruit logo on it. No offense to the fruit fans, though. Thanks!"
Easy to say, not so easy to do. Speaking from experience as both a note-passing, joke-making, comic-drawing student and as a teacher (of adults, no less), it's awfully hard to clamp down on something that's so easy to do surreptitiously. And when you end up spending too much time policing, it gets in the way of actually teaching and just makes everybody irritable.