Welcome on board efgee,
well, first of all I work on objb, because I would like to develop in Basic on OS X - it is just my personal favour and I won't abandon it as I did in the past.
Database support is not directly supported yet, it could be done using objc-bridging/native code, but it is to hard. There are some libs around for several databases, which I would like to include in the future.
Quicktime is supported. You will find an example how to use it.
About the license for professionals. The following is stated on the order section:
The Objective-Basic License gives you the right to update to all coming next versions of Objective-Basic without any costs.
So this means buy once and get all future updates for free.
It is free for personal use.
The next major feature that will come is support for ios.