I took "Show HN" out of the title. "Show HN" is for products and projects that readers can play with now, not just sign up for.

Edit: That's the principle, but it didn't apply to this case. I reverted the change.

I'm posting comments like this for two reasons: for greater transparency, and so you all can tell me when I get it wrong. There is too much material on HN for anyone to evaluate it all accurately, so we're relying on you. Our goal is to have the best stories on the front page.