1. The Time Picker isn't mine, its a open source JQuery Plugin http://haineault.com/media/jquery/ui-timepickr/page/
2. We are working on the Invite Friends/Promote code still, which is why there is a kink in the workflow at the moment, by the time its done, it will all make much more sense.
3. Printable Tickets are planned, actually investigating using moo.com api or something similar, but won't be doing these in the near future.
4. Reserved Tickets are due out next
5. Templates, in due course.
6. No plans to customize the Email at the moment, but we are certainly considering a white label solution which would allow this.
7. Ticket id's aren't customisable, but adding them to the CSV would make a lot of sense, will certainly do that.
I wouldn't be doing it if I didn't think we could make this profitable, hope that is enough of an answer :)
Thanks for the great feedback much to ponder, and will certainly adjust the feature list accordingly.
Mat