Welcome to Crackberry. Searching is your best friend. There is a little box on the top right corner of your screen. Most questions you might have have been answered before so you will not have to wait for a reply http://forums.crackberry.com/blackbe...ybooks-673618/
If you share the BBID, you offcourse will be able to share all the apps bought on any one of the device. However you wont be able to do video chat between the devices if you want to, that needs different BBID on each PB.