Nice, thanks!
Edit: BTW it's really a breath of fresh air to see someone whose product is covered hanging around for a while answering questions. So many people in your position either don't show up on their HN stories at all, or do so only for an hour or so and then leave a ton of questions unanswered.
Probably my number one wish list feature for hacker news would be if they could somehow coax people at companies that get linked to return more, including beyond the first hour or first day.
I hope you check back on this story later and answer more questions that come in from different time zones.