[j0]

Touchdown (for Android) http://www.nitrodesk.com/dk_touchdownFeatures.aspx keeps all of the Exchange Activesync'd data separate from the main email on the phone, so when you get wiped only corporate email/calendar get wiped. I don't think anything similar exists for iPhone.

[jokermatt999]

I can't speak for iPhone (though I imagine it's similar), but pretty much all your data can be recovered to your phone just by logging into your Google Account, from what I understand. If you use AppBrain, the apps you have installed will be saved too.