I'll invite you along when we open next year. we already support Mac OS X, XP, Vista and netbooks running Linux, we also support staff iphones. Use of Service level agreements will layout how far we are willing to support personal devices.
Who supports these devices to get them on the system, let me guess suddenly you have to support Mac, Linux, Windows, iphones you name it with NO additional training. What happens if school staff damage an expensive laptop?
Software, will you tell every student/parent that they need Office or Works or whatever then staff need to be able to open all of these document formats. This is fair enough if you're going Open Office if you do let me know i'm still looking for a secondary school that exclusively uses OO.
Remember just because the world is changing doesn't mean it's for the better.