Will RIM ever open up BBM as a 3rd party app on other devices?  They better hurry!  We just checked out What’s app and so far so good.  WhatsApp Messenger is a smartphone messaging app which allows you to exchange messages with your friends and contacts without having to pay for SMS.   However there is a low fee to purchase but will test it out some more.  Anyone out there have any comments on this app?  http://www.whatsapp.com/