Application for remote-wiping a lost phone without handing access to my data to a third-party?
I don't know of an app that meets your exact requirements.  But a simpler version that's (in my opinion) equally secure is an Android app that listens for a specific SMS message, and wipes the phone.  Remote Wipe does this.  Of course, it doesn't entirely kill the phone's software (that would be very device-specific and require a modified bootloader in most cases); and it might be useful to use one of the apps that reports the phone's physical location too, if you want to recover it.