1. No, a Blackberry version is not available. Currently they have an iPhone version and they are working on an Android version.
You can request a Blackberry version at their Forum in the
2. Yes it has autofill.
3. Hmmm, I didn't test this method. But according to their you must still remember the master password if you have enabled usb/bluetooth authorization.
It is used as a backup method to unlock your database. Maybe you can suggest this feature as well.
4. Yes it connects to the internet to check for updates.