05-13-2008 02:14 PM - edited 05-13-2008 02:52 PM
According to my carrier, PIN to PIN messaging is not free. It is part of your data plan. I think it may depend on your carrier. It is not even possible to message a PIN without a data plan with your carrier, even though it does go directly through the RIM infrastructure which is separate from your carrier's wireless network.
Blackberry Messenger has absolutely nothing to do with SMS (Text messaging), technically or in regards to billing.