Yikes! Thanks, Lucky, for posting this.
Worth noting that all this potential info sharing pertains to Apple's mobile operating system, iOS, which runs on the iPhone, iPod Touch, iPad, and iTV.
As far as I can tell, it does not allow such 'sharing' through Apple computers running the non-mobile operating system.
So, I'll remain a fan of my Apple laptop, but will resist the urge to buy an iPhone until I can be sure of walling off personal information. I'll make sure my friends considering an iPad know this too.
Thanks again.