Let's face it, betatesters have an (unfair? No idea...) advance over plain users when it comes to content creation. Many moons back I actually planned to come up with a kinda semi-commercial Logic thing (mix of videos and PDFs), but as I was out of the beta team by then (simply because I didn't jump onto the Apple train early enough), that was a pointless thing because when new versions were released, it would've taken me a lot of time to cover anything new - but at the very release days the betatesting authors already had their books and what not ready.