I'm wondering how much the iPad will be like a scaled up iPhone OS - because as a smartphone which syncs with Exchange, you can force policies on the iPhone from the server to require a PIN, allow remote data wipe, encrypt data, and so on - but you can't do that to a Windows desktop with Outlook. I don't know if you can to a Mac with Snow Leopard.

If this is going to have OS X/iPhone software, email, a wifi and data connection then it will likely have an ActiveSync connection to Exchange so the policies might be a possibility to keep your data safe(r) in the event of an unscheduled malfunction of an, ahem, ambulatorial nature.