| | Re: BBM/PIN...help!
BBM is carried via PIN to PIN messaging, so if you add him as a contact on BBM he will get your pin, and if he knows enough about how a BlackBerry works, he could start sending you PIN to PIN messages out side of BBM.
But ezrunner is correct, the only association between you PIN number and your identity is the one you make yourself. However, since the only way you can change your PIN number is by changing your BlackBerry I suggest a little caution. If you are already friends on FB, why not get to know him there before deciding if you want to make him a BBM contact, or exchange PINs.
My other Blackberry is a PlayBook.