TUAW: How soon after learning about the Mac App Store did you decide to use it to sell Billings?
AJ: It was a no-brainer; an easy decision. We knew right away that we'd want Billings in the Mac App Store.
What was the process like, and how did the vetting process compare to that of the iOS App Store?
We submitted the first version on November 3rd. It got initially rejected because we were using the Sparkle update tool. Of course, Apple wants us to use their own. So, we removed that, but left a checkbox in the preferences that offered to check for updates automatically, and got rejected again because of it. We removed that and re-submitted, then ran into a private API call. We worked that out, resubmitted, fixed one more minor issue and were approved a couple of days before the store went live.