I haven't JB'd mine. Haven't had time to mess with xpwn
There is the remote app killswitch functionality, but Android has that as well.
Reminds me of the loss of functionality for the Amazon readers to auto-read files. It was done by Amazon and pushed to all hardware/software.
I don't think it's ever been used on either device, so it hasn't exactly been a burning issue yet; the stated purpose is only in the event of a highly malicious application.