Visualizers in the RB beta

An answer to an old post as I do some housekeeping...

1. what format are these in?
Only .qtz file format on Mac is supported. Windows does not have this option.

2. Can we make our own?
.qtz format files can be created using Quartz Composer. 
Quartz Composer is a software development tool provided by Apple. 
If you register as developer, you will be able to download it from Apple website. 
 
3. Will more be available to download or purchase in the future? 
Currently, we do not have any plan of any addition or paid version. 
We will consider the possibility in future.