Originally Posted by
sbm12
Enable the password security. And use a device that supports remote wiping and other security features. Not much help if you insist on an iPhone (though there might be an app for that

) but it is one of the reasons I really like my BB. Knowing that I can remotely wipe it is rather comforting to me.
The single most important thing on the phone is to use password security. After ten tries it will delete all the data on the phone. Then you can restore it later if you find the phone.
Mobile Me allows for remote wiping of the phone, but I think it still has to have the original SIM card in the phone. I guess that's an advantage of devices that don't use SIM cards.
It's cold comfort, but whoever stole your phone probably isn't too interested in your contact list or calendar. They'll quickly wipe it, unlock (or jailbreak) it and sell it.
http://www.apple.com/mobileme/whats-new/