4+ years developing pure java application for one of the most important RIM partners in Europe. I had application on BB Help, as bbplaces or carfinder and in the app store: email scheduler, sms backup, sierra nevada,....
Used to work with client/server communications in XML,JSON,... both in BES and BIS environments, location based applications: carfinder,bbplaces are both free and can give you an idea of my experience.
Please don't hesitate in contacting me in case you need links to these applications or any other issue.