One of the things many people enjoy with BlackBerrys is the ability to BlackBerry messenger friends and chat between smartphones. It does not look like RIM is ever going to open up BBM to other smartphones but WhatsApp is trying to step into that market with their Smartphone Messenger.
WhatsApp Messenger lets you chat between BlackBerrys and iPhones just like BBM. You can share pictures, video, and audio between the phones. They are also working on Android and Symbian apps to round out the offering.
I heard about the app before but Joseph let us know that WhatsApp is now offering a 30 day free trial for WhatsApp Messenger so you can now give it a spin before committing. You can find the free trial at www.whatsapp.com/ota/ or read more at www.whatsapp.com.
Let us know what you think!