There are any number of reasons to use PIN messaging. Blackberry Messenger actually uses the same infrastructure to deliver its messages so if you're using BBM you're using PIN messaging as well.

- PIN's are handy as a free* alternative to SMS (though you're limited to PIN'ing other BB's). There are many times when I want to send a short message and not have all these messages end up in my mailbox. I use PIN's all the time for this reason.

- PIN's are handy when email is down (it happens).

- PIN's are pretty much instantaneous where email delivery times can vary -- despite the instant delivery that people expect from email. Even if you don't use BBM you can pretty much carry a discussion in near-real time via PIN messaging.

- PIN's are more secure than email though if you're on a BES your BES admin can view them.

Now, whether any of these are useful to you specifically are up to you to determine. As you can see, there are plenty of people who never use PIN's.


* Well, included with a BB data plan anyway