Hats off for the notification that popped up as I was trying to import telling me that HN traffic bogged you down. That was very classily and well done.
For me, it wasn't just that it popped up a notification, it's that hitting the arrow on the popup gives you a reply-to window with the text of the notification already filled in. Really made me feel welcome.
It looks like she's using http://intercom.io for the notifications. We use them at http://circleci.com and they've been hugely valuable for getting feedback.
