Thanks for the reports Drew. One of them, "Preview Post button is not working properly". When you click this now, it should show you your preview right beneath the post textarea instead of having to load an entire new page. Are you not seeing this?
Definitely plan on adding the ability to have multiple participants in a private topic. The foundation is there, just need to figure out the best way to enter multiple participants.
As for a payment option. That's definitely something I want to put in. It wouldn't be in version 7, but more than likely would be something that would be started for 7.1. Version 7 will concentrate on reasons to get people willing to pay
